3rd Grade Science Post Test

Glenda was looking into a bucket of soil. The soil appeared dry, grainy, and white. The soil was probably made up mostly of

• sand

• topsoil

• leaf bits

• clay

Which type of soil holds water the best for growing most types of plants?

• clay soil

• silty soil

• sandy soil

• loam soil

A _______ is a source of heat.

• book

• toaster

• flower

• baseball

Lee holds a magnifying lens close to a leaf. He holds the lens so that a small bright dot appears on the leaf, as shown in the picture. What does the magnifying lens in the sunlight do to the leaf?

• It makes the leaf take up more space.

• It makes the leaf warmer.

• It makes the leaf heavier.

• It makes the leaf cooler.

What evidence do scientists have that some animals that are now extinct existed thousands of years ago?

• rock formations

• photographs

• fossils

• all of these

When a dead organism decays and leaves its imprint in the mud, ________ can be formed over a long time.

• a landfill

• a fossil

• a mineral

• an ore

Daniel saw that one part of his yard was brightly lit, while another part was in shade. He measured the temperature in both parts and found that it was warmer in the brightly lit part. Why is this?

• In shady areas, something has blocked some of the Sun's light and heat.

• In sunny areas, something has blocked some of the Sun's light and heat.

• There is more wind in sunny areas.

• There is more wind in shady areas.

Jennifer scratches a rock with an iron nail. She then observes how shiny the rock looks. What two properties of the rock is Jennifer observing?

• texture and color

• hardness and color

• luster and texture

• hardness and luster

Some bats hibernate in caves during the winter months. This means that they do not move or need to eat during this time. How does this help bats survive in their habitat?

• It lets them use up more energy during a season when there is less food.

• It lets them save energy during a season when there is less food.

• It helps them better see their prey during the winter.

• It helps them migrate north for the winter.

Which type of soil would be best for growing a garden?

• dry, silty soil

• dry, clay soil

• moist, mixed soil

• moist, sandy soil