4.3 Science

Australia experiences winter when the United States experiences summer. What is the best explanation of this occurrence?

• Earth's rotation

• sun's distance from the Earth

• Earth's tilt

The revolution of the moon around Earth makes the moon appear to change its shape in the sky. The changing shape of the lit part of the moon that we see is called its —

• crescent

• position

• phase

• state

The sequence below shows the different amounts of visible light seen during the moon’s appearance.

If a picture was added to the right, it can be predicted that the visible light seen would —

• increase

• decrease

• expand

• disappear

On a bright, sunny day, which time of day can be predicted to create the shortest shadows? 

• 9:00am

• 12:00pm

• 3:00pm

• 12:00am

Which direction would the man’s shadow be pointing at 3 P.M.?

• 
• 
• 

A student reads the following statement in a science book.

Which natural occurrence is the statement explaining?

• moon phases

• day and night

• seasons

• not here

Students create a model to show how the sun casts shadows during the day. Each hour, students record their observations and mark where the shadow falls. The model is placed in the same location each hour. The activity is repeated each month.

What is the purpose in repeating the activity each month? 5.2(E)

• to decrease accuracy of results

• to increase reliability of results

• to increase questionable results

• to decrease valid results

Which of the following tools would be most useful for measuring shadows? 5.4(A)

• pan balance

• flashlight

• collecting net

• meter stick

What causes different parts of the moon to be lit as it orbits Earth?

• rotation around the sun

• refraction from the sun

• revolving around the sun

• reflection from the sun

The picture below shows a beach at sunset.

What compass direction must the person face to view his shadow? 5.2(D)

• North

• South

• East

• West