2nd Grade Wonders Unit 4 Assessment

The seasons are caused by:

• The distance of the Earth from the Sun

• The tilt of the Earth's axis

• The rotation of the Earth

• The orbit of the Moon around the Earth

The Earth takes how long to travel around the Sun?

• 365 days

• 24 hours

• 30 days

• 7 days

During which season does our half of Earth tilt away from the Sun?

• Winter

• Summer

• Spring

• Autumn

Read the passage: Changing Seasons. What happens during spring and autumn in terms of Earth's tilt?

• During spring, the Earth's tilt is towards the sun, and during autumn, it is away from the sun.

• During spring, the Earth's tilt is away from the sun, and during autumn, it is towards the sun.

• During both spring and autumn, the Earth's tilt is neither towards nor away from the sun.

• During both spring and autumn, the Earth's tilt is towards the sun.

Why does the air get warmer in spring than in winter?

• A. Our part of Earth begins to lean a little bit toward the Sun.

• B. Our part of Earth begins to tilt away from the Sun.

• C. The Sun begins to burn hotter at this time of year.

• D. The Sun is only half as far away from Earth.

Why is it winter in the southern half of Earth when it is summer here?

• The different sides of Earth cannot all lean toward the Sun at the same time.

• The southern half of Earth is always colder than the northern half.

• The different seasons happen when the Sun gets larger or smaller.

• One side of the Sun is much hotter than the other side.

Read the passage about caves. What is the largest part of a cave?

• The entrance

• The chamber

• The tunnel

• The exit

Read the passage about caves. How are caves formed?

• Caves are formed by the dissolution of limestone by acidic water.

• Caves are formed by volcanic activity.

• Caves are formed by the accumulation of sand and dust.

• Caves are formed by the erosion of glaciers.

Read the passage about caves. The rock wears away due to:

• water erosion

• wind erosion

• chemical reactions

• animal activity

Read the passage about caves. How long does it take for a cave to form?

• A few years

• Hundreds of years

• Thousands of years

• Millions of years