Science Bowl Super Team 9000

Two wires carrying electricity can create a spark if they come too close together. This spark can start a fire. Wires carrying electricity are usually covered with plastic to keep them from starting a fire. Why does the plastic keep the electricity from starting a fire?

• Plastic is a good insulator.

• Plastic is softer than wire.

• Plastic can melt when heated.

• Plastic conducts electricity.

Which of these is the best conductor of electricity?

• Glass rod

• Cotton string

• Plastic tubing

• Copper penny

A teacher mixes a white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating?

• Solubility

• Density

• Conductivity

• Mass

A student measures the temperature of water being heated on a hot plate. The student observes that the temperature of the water is 53°C. How many more degrees Celsius must the temperature rise before it reaches the boiling temperature of water?

• 159°C

• 69°C

• 20°C

• 47°C

A change in structure or behavior that allow organisms to survive in their environment.

• Weathering

• Inherited trait

• Adaptation

• Learned behavior

The amount of matter in something.

• Volume

• Mass

• Density

• Weight

A push or pull that can change the position and / or motion of an object or material.

• Friction

• Magnetism

• Gravity

• Force

The process of water changing from water vapor to a liquid by loss of heat.

• Evaporation

• Condensation

• Precipitation

• Transpiration

The path that one object in space follows as it revolves around another object in space.

• Rotation

• Axis

• Revolution

• Orbit

Fuels formed over millions of years from the remains of ancient plants and animals.

• Fossil fuels

• Renewable Energy

• Alternative Energy

• Ancient Energy