What Do I Know?

Which of the following explains how animals are able to sense sounds in their environment?

• Each kind of sound triggers a different cell in the inner ear.

• Sound waves enter the brain through openings in the skull.

• Receptors pick up the information about sounds waves and send it to the brain.

• The ears send signals out in to the environment and interpret what comes back.

Different sensory receptors are located in different parts of the body. How might sensory receptors in the eyes differ from those in other parts of the body? Sense receptors in the eyes need to be....

• larger than other kinds of receptors.

• Sensitive to changes in light.

• able to send information to the muscles.

• faster at processing information.

This diagram shows the process the body uses to respond to information received through the senses.

• Information stored for later use

• Information sent to the brain

• Body systems respond to information

• Receptors respond to the information.

What adaptation does a mouse have to allow it to use its sense of smell to find food?

• Front paws for holding fruit

• Special cells in its nose.

• Feeding mostly at night

• Strong teeth to crush seeds.

How does memory help guide the actions of an animal?

• Animals can remember things that have happened long ago.

• Memories are stored in the brains of most animals.

• Animals can avoid actions that have been harmful to it in the past.

• Memories will not be passed on from parents to offspring.

Plants are able to make their own food because they

• have special parts

• grown from seeds

• live in different places

• don't have a mouth

Famers notice that an apple tree that does not produce flowers will not produce any fruit, and no seeds. This is evidence to support the idea that....

• flowers help protect an apple tree from insects.

• an apple tree can't live unless it makes fruit.

• the fruit of some tress does not contain seeds

• apple trees use flowers to produce offspring.

Students have the idea that the mouth parts of an insect are adapted to the kind of food they eat. What observation could be used to support this idea?

• The mouth parts of an insect can change over its life cycle.

• Insects that are closely related have the same mouth parts.

• The mouth parts can be different on insects that live in the same place.

• Insects with different mouth parts eat different kinds of food.

A student has an idea that the leaves of a plant absorb sunlight to help the plant make sugar it needs as food. To test this idea, the student places some plants in the sunlight. They student covers the leaves of half the plants with dark paper.

After 2weeks, the students tests all the plants for how much sugar they contain. Which observation would support the claim of the student?

• Plants with covered leaves contain much less sugar than the other plants.

• Not all the leaves on all the plants were exactly the same size.

• Some of the plants with covered leaves contained some sugar.

• The test for sugar sometimes does not work and must be repeated.

The fossils of clams, which live at the seashore, were found in a rock layer directly below a rock player that contained three fossils.

This evidence can be used to support the idea that

• fossils form more quickly at the seashore than other places.

• clams and tree are always found in the same area.

• the area where the fossils were found changed over time.

• the layer containing the trees is older than the clam layer.