Grade 7 Science Chapter 2 Summary

Light hits a thin pane of glass. It either passes straight through or bounces back to where it came from. Based on this description, which of these does NOT happen to the light?

• Transmission

• Absorption

• Reflection

Name the type of galaxy shown.

Which of the following is shown in the picture?

• Reflection

• Absorption

• Refraction

• Diffraction

Blue light has a shorter wavelength than red light. What can we say about the frequencies?

• Blue light has a LOWER frequency than red light

• Blue light and red light have the SAME frequency

• Blue light has a HIGHER frequency than red light

Compare the AMPLITUDE of the sound waves from an aeroplane's jet engine and a motorbike engine.

• The jet sound waves have a HIGHER amplitude.

• They have the SAME amplitude.

• The jet sound waves have a LOWER amplitude.

TRUE or FALSE - the more energy an object has, the lower frequency the emitted radiation has.

• TRUE

• FALSE

Name one type of electromagnetic wave.

The name for a small collection of stars in the sky that form a recognisable shape

• Constellation

• Circumpolar

• Galaxy

• Black Hole

Give the name of the cycle that is used to predict the next eclipse....

Name the force that holds galaxies together

• Strong Force

• Nuclear Force

• Electromagnetic Force

• Gravity