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GENERAL SCIENCE: GRADE 7
WEEK 1
TOPIC: Matter
LESSON 1: States of Matter
A. Draw arrangement of particle for the 3 states of matter.
B. Place a tick √in the correct box. Two have been done for you.
Solid Liquid Gas
Property Solid Liquid GasFixed Shape
Cannot be compressed √Can Flow
Takes the shape of the container
√No fixed shape or volume
Fairly easy to compress
GENERAL SCIENCE: GRADE 7
WEEK 1
TOPIC: Matter
LESSON 2: States of Matter
Using the pictures in the matter worksheet to determine if it's a solid, liquid or gas. Matter is everywhere and everything is matter.
GENERAL SCIENCE: GRADE 7
WEEK 1
TOPIC: Matter
LESSON 3: Changes of State
Name: ________________ Grade ____ Date: ___________________
I start as a solid. When I get hot I melt and become a
_____________________________.
I start as a liquid. When I get cold I freeze into a
___________________________.
I start as a liquid. When I get hot I evaporate into a
__________________________.
I start out as a solid. When I get cold I stay the
______________________________.
.______________ 1
4._______________
2._____________
3.______________
GENERAL SCIENCE: GRADE 7
I am a gas. When I get cold I turn into a _________________________.
Bonus question!
Solids, Liquids and Gases are all made of ________________________.
WEEK 2
TOPIC: Matter
LESSON 4: Changes of State
Name: ________________ Grade ____ Date: ___________________
SOLID LIQUID GAS
1. Look at the above diagram and use the words below to fill in the gaps where you think the following processes go?
Freezing Melting Condensing Boiling
2. Use the words in the boxes below to fill in the blanks.
Solids have a _______________ shape and cannot be __________________because the particles are
_______________together and have no space to move.
____________________take the shape of their container. The particles are close together and can
____________________ around each other but they cannot be compressed.
The particles in a_________________ move in all directions and________________ out to completely fill their
container. Gas ________________are far apart so they can be easily squashed.
fixed gas spread closeLiquidsmoveparticlessquashed
GENERAL SCIENCE: GRADE 7
WEEK 2
TOPIC: Matter
LESSON 5: Physical and Chemical Properties of Matter& Physical and Chemical Changes
Name: ________________ Grade ____ Date: ___________________
Physical and Chemical ChangesA) State whether the following is a physical change or a chemical change. 1. wood rots _________________
2. iron rusts __________________
3. ice melts ___________________
4. water is heated and changed into steam. ____________________
5. souring milk ___________________
Physical and Chemical propertiesB) State whether the following is a physical property or a chemical property. 1. red color ________________________
2. flammability ______________________
3. hardness _________________________
4. bitter taste _________________________
5. wood burns in air ____________________
True and falseC) Answer true or false.
1. ________ Cooking is an example of a chemical change.
2. ________ Aphysical change is usually not reversible.
3. ________ A change in the size of matter is a physical change.
4. ________ The identity of the substances undergoing a chemical reaction never changes in a chemical change.
5. ________ Breaking a large piece of glass into smaller pieces is a physical change.
6. ______ Physical properties of matter can be identified without resulting in a change in the chemical composition of matter.
7. _______ Chemical properties does not result in a change of matter.
8. ________ Chemical properties of matter describes how one kind of matter does not react with other kinds of matter.
9. _______ The properties of matter can be classified into two general types.
10. _______ Shape is an example of a physical property.
GENERAL SCIENCE: GRADE 7
WEEK 2
TOPIC: Matter
LESSON 6: Physical and Chemical Changes
Name: ________________ Grade ____ Date: ___________________
A. Use the words below to fill in each blank space.
state burn reversible physical melt irreversible different particles colour chemical
If you heat ice it will ____ into water. This is a _________ change. Physical changes often involve a change of
_____. They are __________ which means they can be easily undone. In a physical change, no new material is
formed.
When bread is heated it will _____ and become toast. Burning is a ________ change. Chemical changes are
______________ meaning they are difficult to undo. We can sometimes recognise chemical changes because
we see a ______ change. In a chemical change, new materials formed that are _________ to the starting
materials. This is because the _________ become rearranged.
1. State an example of a chemical change.__________________________________________________________________________________
2. State an example of a physical change.____________________________________________________________________________________
3. Study the diagram of particles below. Do you think it shows a chemical or physical change? Why?
(a) Do you think it shows a chemical or physical change?
____________________________________________________________________________________
(b) State reason for your answer.
____________________________________________________________________________________
1. ________ Cooking is an example of a chemical change.
2. ________ Aphysical change is usually not reversible.
3. ________ A change in the size of matter is a physical change.
4. ________ The identity of the substances undergoing a chemical reaction never changes in a chemical change.
5. ________ Breaking a large piece of glass into smaller pieces is a physical change.
6. ______ Physical properties of matter can be identified without resulting in a change in the chemical composition of matter.
7. _______ Chemical properties does not result in a change of matter.
8. ________ Chemical properties of matter describes how one kind of matter does not react with other kinds of matter.
9. _______ The properties of matter can be classified into two general types.
10. _______ Shape is an example of a physical property.
GENERAL SCIENCE: GRADE 7
____________________________________________________________________________________
WEEK 3
TOPIC: Matter
LESSON 7: Diffusion
A. Use the words from the box to complete the sentences below.
equilibrium low energy high without movement
Diffusion is the _________________________ of molecules across the cell membrane __________________ the use of _______________. Movement of molecules from _________ concentration to ________ concentration WITH the concentration gradient. Continues until concentrations reach ___________________________.
B. Complete 1 and 2 by following the instructions at the right.
1 1. Draw in the molecules on the right hand side of the selectively
permeable membrane, showing a lower concentration of the substance compared to the left-hand side.
2. Draw in arrows to show the direction of the concentration gradient .
2 3. Now draw in the molecules on bothsides of the selectively permeable
membrane to show that equilibrium has been reached due to diffusion.
GENERAL SCIENCE: GRADE 7
WEEK 3
TOPIC: Matter
LESSON 8: Osmosis
Name: ________________ Grade ____ Date: ___________________
A. Use the words from the box to complete the sentences below.
water low balance high diffusion
Osmosis is a form of ________________ that involves _________. Movement of water molecules from areas of ______ water concentration to areas of _____ water concentration. This helps to _______________ out the other molecules inside of a cell.
KEY FORDIAGRAMWater Molecule Solute Molecule
1 1. Draw in the molecules on the right hand side of the
selectively permeable membrane, showing a lower concentration of water molecules compared to the left-hand side.
2. Draw in arrows to show the direction of the concentration gradient.
3. Now draw in watermoleculeson both sides of the selectively permeable membrane to show that equilibrium hasbeen reached due to osmosis.
GENERAL SCIENCE: GRADE 7
WEEK 3
TOPIC: Energy
LESSON 9: Forms of Energy
Name: ________________ Grade ____ Date: ______________
Look at each pair of pictures below and state which form of energy is shown.
The Sun A light bulb
Form of energy
A bonfire A Bunsen burner
Form of energy
A hamburger Coal
Form of energy
A nuclear power station An atom bomb
Form of energy
GENERAL SCIENCE: GRADE 7
2. Look at each of the pictures in the table. Some of them give us more than one form of energy. Write down
three examples in sentences like this “The bunsen burner gives off heat and light energy”.
GENERAL SCIENCE: GRADE 7
WEEK 4
TOPIC: Energy
LESSON 10: Potential and KineticEnergy
Name: ________________ Grade ____ Date: ______________
A) Think about which type of mechanical energy the following contain. Place an X in the appropriate box.
DESCRIPTION KINETIC ENERGY
POTENTIAL ENERGY
A car traveling 80 mph along a flat roadA rubber band that is stretchedA bowling ball rolling down a laneA piano lifted to a third story windowA snowboarder jumping off a rampAn airplane traveling at a speed of 350 mph
B) Study each picture. State whether each picture shows an example of POTENTIAL ENERGY or KINETIC ENERGY. State reason(s) for your answer.
1. _________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
2. _________________________________________________________________
GENERAL SCIENCE: GRADE 7
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
3. _________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
GENERAL SCIENCE: GRADE 7
WEEK 4
TOPIC: Energy
LESSON 11: Energy Transformation
A. Use the words below to fill in each empty box.
Chemical potential, Kinetic, Elastic potential, Electrical, Gravitational potential, Light, Thermal, Sound
Chemical potential Battery powered torch
Energy in
Device Energy out
Kettle Thermal
Energy in
Device Energy out
Microphone
Energy in
Device Energy out
Pendulum
Energy in
Device Energy out
Gas Oven
Energy in
Device Energy out
Solar Panel
Energy in
Device Energy out
GENERAL SCIENCE: GRADE 7
B. Think of three more devices and write how they transfer energy from one form to another.
Energy in
Device Energy out
Energy in
Device Energy out
Energy in
Device Energy out
RENEWABLE NONRENEWABLE
GENERAL SCIENCE: GRADE 7
WEEK 4
TOPIC: Energy
LESSON 12: Renewable and Non-Renewable Energy
Name _________________________________________ Date __________________ Period ___________
A) Complete the following statement:
Renewable resources are replenished ___________________________________________________ while,
nonrenewable resources cannot be replenished ______________________________________________.
B) Complete the following Venn diagram for renewable and nonrenewable resources:
C)Read the statements below and determine whether each is an example of renewable or nonrenewable:
1. Nuclear _________________________________
2. Sunlight _________________________________
3. Corn _________________________________
4. Natural Gas _________________________________
5. Oil ________________________________________