Grade 8 Science February Cumulative Review.notebook

1

February 19, 2014

Feb 8­7:52 AM

 

 

Feb 27­9:14 AM

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Label the water cycle

A ‐ Evaporation D ‐ Run‐offB ‐ Condensation E ‐ GroundwaterC ‐ Precipitation

Grade 8 Science February Cumulative Review.notebook

2

February 19, 2014

Feb 27­9:14 AM

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What are the 5 types of technologies used to research the ocean floor?

1) Sonar2) Satellites3) Underwater photography and videography4) Submersibles5) Diving

Feb 27­9:14 AM

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Click hereto goback What is salinity? Density?

Salinity is the amount of salt dissolved is a certain amount of water. Density is the ratio of salt to water.

Grade 8 Science February Cumulative Review.notebook

3

February 19, 2014

Feb 27­9:14 AM

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Name the following:

A

B

A ‐ NeapB ‐ Spring

Feb 27­9:14 AM

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What are the three main differences between salt water and fresh water?

1 ‐ Salinity2 ‐ Density3 ‐ Freezing Point

Grade 8 Science February Cumulative Review.notebook

4

February 19, 2014

Feb 27­9:14 AM

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Click hereto goback What are the colors in the visible light spectrum?

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Feb 27­9:14 AM

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How do frequency and wavelength compare?

The higher the frequency the closer the wavelength

Grade 8 Science February Cumulative Review.notebook

5

February 19, 2014

Feb 27­9:14 AM

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What is the difference between translucent, transparent, and opaque?

Transparent is easy to see through (window)Translucent is harder to see through, but still able to see things behind it (shower door)Opaque is something that you are unable to see through (desk)

Feb 27­9:14 AM

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What property of light causes shadows?

Rectilinear Propogation

Grade 8 Science February Cumulative Review.notebook

6

February 19, 2014

Feb 27­9:14 AM

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What is the difference between specular and diffuse reflection?

Specular creates an image of the reflection.Diffuse just reflects the surface of the object.

Feb 27­9:14 AM

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If a ball bounces 15 times in 6 seconds, calculate the frequency.

Frequency = cycles second = 15÷6 = 2.5 Hz

Grade 8 Science February Cumulative Review.notebook

7

February 19, 2014

Feb 27­9:14 AM

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Calculate the flow rate if it takes 4 seconds to go 16 cm.

Flow Rate = cm/s = 16 cm / 4 seconds = 4 cm/s

Feb 27­9:14 AM

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Put a greater than or less than sign between the pictures. Is there an exception to your rule?

> >

Grade 8 Science February Cumulative Review.notebook

8

February 19, 2014

Feb 27­9:14 AM

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Which of the following has the highest viscosity?

Water, Rubbing Alcohol, Dish Liquid, Corn Syrup

Corn Syrup

Feb 27­9:14 AM

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What is the density of a 50.6 mL substance with a mass of 40 g?

D = m/V = 40g / 50.6mL = 0.79 g/mL

Grade 8 Science February Cumulative Review.notebook

9

February 19, 2014

Feb 27­9:14 AM

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What is the mass of a substance that is 15.8 cm3 with a density of 8.4 g/cm3?

m = DxV = 8.4 g/cm3 x 15.8 cm3

= 132.72 g

Feb 27­9:14 AM

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What is the force of an object with an area of 4 m2 and a pressure of 10000 Pa?

F = P x A = 10000 Pa x 4 m2

= 40000 N

Grade 8 Science February Cumulative Review.notebook

10

February 19, 2014

Feb 27­9:14 AM

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Label the diagram

A

B

C

D

E

A ­ reflected rayB ­ angle of reflectionC ­ normalD ­ angle of incidenceE ­ incident ray 

Feb 27­9:14 AM

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Click hereto goback Complete the SPOT table for the following ray diagram.

The image will be…

1. Size Smaller

2.Position Closer

3.Orientation (upright or inverted) Upright

4.Type of Image (Real or virtual?) Virtual

Grade 8 Science February Cumulative Review.notebook

11

February 19, 2014

Feb 27­9:14 AM

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What is a balanced force? Unbalanced force?

Balanced force: 1) equal in strength 2) opposite in direction 3) no movement

Unbalanced force: 1) unequal in strength 2) change in speed and direction

Feb 27­9:14 AM

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What is the correct order of the following?

1) Sea‐arch2) Sea‐cave3) Sea‐stack4) Headland

4, 2, 1, 3

Grade 8 Science February Cumulative Review.notebook

12

February 19, 2014

Feb 27­9:14 AM

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Which happens first, Thunder or lightening? Why?

Lightening, because light travels faster than sound

Feb 27­9:14 AM

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What is the relationship between temperature, pressure and volume?

P = V

T = V

T = P

Grade 8 Science February Cumulative Review.notebook

13

February 19, 2014

Feb 27­9:14 AM

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Radio waves have the:

___________ wavelength___________ frequency___________ energy

longest wavelengthlowest frequencylowest energy

Feb 27­9:14 AM

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What is the relationship between viscosity and friction?

Increase friction = increase viscosity