Topic 1 The Universe

Topic 1 Lesson 2 ( Sun & Its Energy)

• Gravity pulls objects toward one another.

• On Earth gravity pulls things toward Earth.

• When things fall, they fall towards Earth.

Open Ended

The ball will________ because of _________.

Stars

A Star is a giant ball of hot gases that release energy. Some energy is in the form of light and some in the form of heat.

Light from stars take time to reach Earth. A light-year is the distance light travels in one year.

Multiple Choice

What is the best description of a star?

• a rocky ball of fire

• a ball of hot gases

• A collection of clouds and dust

• a sphere that reflects the sun's light

Open Ended

How does distance affect the time light from a star takes to reach Earth?

Most telescopes magnify light to allow scientist to see more. What kind of telescope allows scientist to find objects without light?

Refracting telescope, Reflecting telescope, or Radio telescope

Multiple Choice

Suppose a scientist wants to explore an unknown object that is located in a dark part of space. What kind of telescope should they use to observe the object?

• refracting telescope

• radio telescope

• reflecting telescope

• optical telescope

Exposure...

• The more light exposure, the more you can capture, or see.

• Telescopes can help our eyes to capture more light.

Multiple Choice

Which star is most likely to appear the brightest when viewed from Earth? (Star A: 11.4 lightyears, Star B: 32 lightyears, Star C: 8.6 lightyears, Star D: 74 lightyears)

• Star A

• Star B

• Star C

• Star D

This is an example of how the auroras appear in the night sky, why does it occur?

• particles from the sun collide with oxygen at the northern and southern poles causing these beautiful colors.

Multiple Choice

How long does it take Earth to spin on its axis?

• 365 days

• 24 hours

• 8 min

• 5 hours