Front

Which of these is not an example of the bicycle using mechanical energy?
The pedals, gears, and chain help turn the wheels.
The wheels turn when the bicycle moves.
The front wheel guides the bicycle as it moves.
The reflector allows the bicycle to be seen at night.

Back

The reflector allows the bicycle to be seen at night.

Front

A farmer keeps bees to pollinate crops. The farmer makes several observations about the bees. Which of these observations describes a learned behavior? Bees make return trips to drink sugar water from a bowl placed 40 meters from their hive.

Back

Bees make return trips to drink sugar water from a bowl placed 40 meters from their hive.

Front

How do structures such as whiskers and antennae benefit organisms?

Back

They help the organisms detect their surroundings.

Front

An energy company wants to build a hydroelectric power plant. Which of these characteristics of an area is most important to the development of a hydroelectric power plant? The area has a cool, rainy climate. The area is located in a valley with very little wind and frequent heavy fog. The area has a river that flows rapidly from nearby mountains through a valley. The area has no geysers or hot springs.

Back

The area has a river that flows rapidly from nearby mountains through a valley.

Front

Some students investigate the properties of four objects using a hand lens, a magnet, and a beaker containing water. Their observations are recorded in the table. Which statement identifies a property that could be used to classify these objects into two different groups?

Back

Density can be used to separate objects that sink in water from objects that do not.

Front

Which group of animals is most likely supported by an African savanna?

Back

Front

Some characteristics of objects in the solar system are listed here. Which of the listed characteristics describe both Earth and the moon?

Back

Front

The table shown lists ways that four organisms obtain energy. Which organism obtains energy without depending on another organism? Options: Oak tree, Mushroom, Cottontail rabbit, Mountain Lion

Back

Oak tree

Front

A student observed liquid wax dripping down the side of a burning candle. After putting out the candle’s flame, the student left the room. Several hours later the student observed that there was no longer any liquid on the side of the candle. Which statement explains what most likely happened to the liquid wax?

Back

The liquid wax changed back into a solid as it cooled.

Front

Which statement best describes the relationship between humans and plants in the carbon dioxide–oxygen cycle?

Back

Humans depend on oxygen released into the air by plants, and plants depend on carbon dioxide that humans release into the air.