Science grade 4 T3 review

Describe a scenario where an animal's sense receptors play a crucial role in its survival.

• Animals rely on their sense receptors to drive a car

• Animals rely on their sense receptors to detect danger and find food.

Give an example of a sense receptor specialized for a particular kind of information.

• Photoreceptor in the eye for detecting light

• Mechanoreceptor in the ear for detecting light

What part of the animal processes the information from sense receptors?

• brain

• stomach

Some crab species have hard outer shells. The hard shell of a crab most likely functions to help the crab..?

• find food.

• protect itself.

• find shelter.

• store water.

Barn swallows return to the same area each year. They fly in large groups and chatter loudly. When a pair of swallows gets close to the area, they look for their old nest from the year before. Swallows have sharp vision and can see well from a distance. Once they find their nest, they add mud and grass to it. Then, they reuse the nest.

Which statement is supported by the information about barn swallows?

• Barn swallows use their sense of smell to find other swallows.

• Barn swallows use their sense of sight to find their old nest.

• Barn swallows use their sense of hearing to find a mate.

• Barn swallows use their sense of touch to find mud and grass.

A student makes a model of a maze out of cardboard to study how mice locate their food. The student places a piece of cheese at one end of the maze, puts a mouse at the other end of the maze, and covers the maze with a net. The top view of the maze is shown.

Which senses would best guide the mouse to reach the piece of cheese at the end of the maze?

• smell and taste

• sight and sound

• taste and touch

• sight and smell

White-tailed deer have sense organs to help them detect and escape from hungry predators.

Which sense organs allow the white-tailed deer to receive vibrations and detect the sound of hungry predators?

• hearing organs

• smelling organs

• tasting organs

• touching organs

Pupils are the dark part of the eye. They are located in the center of the eye, surrounded by the iris, which is the colored part. When animals use their eyes at night, their pupils get larger. This is like making the pinhole in the shoebox bigger.

How does having larger pupils help an animal see when there is not much light?

• A larger pupil lets more light into the eye.

• A larger pupil makes images in the eye sharper.

• 
  A larger pupil lets the animals' eyes see colors more clearly.

• A larger pupil makes eyes darker, so the animal is harder to see.

Water lilies grow in ponds. Their roots grow in the sand and dirt at the bottom of ponds. Their leaves and flowers sit on the top of the water. Stems connect the roots to the leaves and flowers.

How does the stem of a water lily help the plant grow?

• by holding the roots up so that they do not get buried by sand and dirt

• by keeping the flowers out of the water so they cannot make seeds

• by taking in food from the water so the plant can eat

• by letting the leaves reach the top of the water so the plant can get sunlight

The Ring of Fire is an area where a large number of earthquakes and volcanic eruptions occur. What claim can be made about the Ring of Fire from this information?

• It is the only place on Earth where earthquakes can happen.

• It has been getting larger since Earth first formed.

• It represents the areas where tectonic plates are the thickest.

• The edges of the tectonic plates are moving in this area.