Science Bowl Team Questions

Margot measured 400 milliliters (mL) of water using a beaker. She then heated the water until it boiled. She poured the boiling water back into the beaker and saw that there was less water than she had before.

What property changed after the water was boiled?

• color

• shape

• texture

• volume

The Sun provides Earth with two forms of energy. What are the two forms of energy?

• light and heat

• sound and motion

• electricity and light

• magnetism and heat

Susanna uses a rope to lower a bucket in order to get water from a well near her house. Which force allows the bucket to be lowered?

• electrical

• friction

• gravity

• magnetism

Regina is going to dissolve a teaspoon of sugar in a cup of hot tea. What could Regina do to dissolve the sugar more quickly?

• add ice to the cup

• stir the tea vigorously

• add more sugar to the tea

• put the tea and sugar in a larger cup

Sarai noticed that when she breathed on a cold mirror, the glass fogged up. Which of the following best explains why this happened?

• Sarai’s breath caused a physical change, which froze the mirror.

• Cooling caused a physical change, which caused Sarai’s breath to condense on the mirror.

• Sarai’s breath cooled the mirror and caused a chemical change, which produced a white substance.

• Cooling caused a chemical change, which turned oxygen from Sarai’s breath to water on the mirror.

All living things use energy. What kind of energy does a plant use to make its food?

• electrical

• light

• magnetic

• mechanical

A musician is playing a guitar. As she plucks the strings, she can feel the guitar vibrating. What type of energy causes this vibration?

• heat energy

• sound energy

• electrical energy

• chemical energy

Windmills use wind to produce electricity. Wind provides which kind of energy to the windmills?

• The wind provides heat energy.

• The wind provides chemical energy.

• The wind provides electrical energy.

• The wind provides energy of motion.

When music is heard from a radio, several energy transformations are taking place. Which of the following shows one of these transformations?

• heat energy in the radio ⇒ sound energy in the air

• chemical energy in the radio ⇒ heat energy in the air

• electrical energy in the radio ⇒ sound energy in the air

• chemical energy in the air ⇒ heat energy in the eardrum

Jill threw a baseball 20 meters. She then threw a basketball 10 meters from the same location and with the same force. Which of the following statements best describes why the basketball did not travel as far as the baseball?

• An object in motion may change its direction.

• An object will travel farther if it has greater speed.

• The less mass an object has, the less effect a force will have on the object’s motion.

• The more mass an object has, the less effect a force will have on the object’s motion.