SCIENCE 6 REVIEW

Sylvia and Renzo each have a cup of water at the same temperature. How could Sylvia's cup have more thermal energy than Renzo's?

• Sylvia's cup could have more calories

• Sylvia's cup could have more water particles and lesser total kinetic energy

• Sylvia's cup could have more water particles and greater kinetic energy

Answer explanation

Sylvia's cup can have more thermal energy if it contains more water particles, which increases the total energy. Additionally, if these particles have greater kinetic energy, it further contributes to the higher thermal energy.

During a class discussion, Jonathan asked what any energy resource that can be used in place of fossil fuels is called?

• alternate energy

• solar energy

• nuclear energy

Answer explanation

The term 'alternate energy' refers to any energy resource that can replace fossil fuels. This includes various sources like solar and nuclear energy, but 'alternate energy' is the broader category that encompasses all such alternatives.

During a science class, Karina and Andrew were discussing how our bodies get energy from the food we eat. Which of the following forms of energy best describes the energy stored in food?

• mechanical energy

• sound energy

• chemical energy

Answer explanation

The energy stored in food is best described as chemical energy. This is because food contains nutrients that release energy through chemical reactions during digestion, which our bodies use for various functions.

During a science class, Andrew and Isla learned about a non-renewable resource formed from the remains of ancient organisms. What is this resource?

• fossil fuel

• coal

• biomass

Answer explanation

The correct answer is 'fossil fuel' because it refers to non-renewable resources like coal, oil, and natural gas, which are formed from the remains of ancient organisms. While coal is a type of fossil fuel, the broader term is more accurate.

Elias and Abigail were discussing different types of resources. Elias mentioned a resource that forms at a rate much slower than the rate at which it is used. What type of resource is he referring to?

• renewable

• non renewable

• energy

Answer explanation

Elias is referring to a non-renewable resource, which forms at a much slower rate than it is consumed. Unlike renewable resources, non-renewable resources such as fossil fuels are finite and deplete over time.

While hiking, Renzo and Abigail noticed a boulder perched on a hill. They discussed that the sum of the boulder's kinetic and potential energy is known as its

• Thermal energy

• Mechanical energy

• Chemical energy

Answer explanation

The sum of kinetic and potential energy in a system is referred to as mechanical energy. This concept applies to the boulder, as it has both potential energy due to its height and kinetic energy if it were to move.

During a science class, Dominic and Sylvia were discussing why a drop of food coloring spreads in water. Which theory explains that all of the particles that make up matter are in constant motion?

• Kinetic theory of matter

• conservation of energy

• law of charges

Answer explanation

The kinetic theory of matter states that all particles in matter are in constant motion. This explains why a drop of food coloring spreads in water, as the moving particles mix the color throughout the liquid.

When Andrew places a hot cup of coffee on a table, what is the energy transferred from the coffee to the table called?

• Heat

• Energy

• Pressure

Answer explanation

The energy transferred from the hot coffee to the table is called heat. This process occurs as thermal energy moves from the hotter object (coffee) to the cooler one (table), resulting in a temperature change.

During a science experiment, Isla observed that when she heated a pot of water on the stove, the water started to circulate and transfer heat throughout the pot. Which of the following processes is responsible for this transfer of energy as heat by the movement of the water?

• conduction

• convection

• emission

Answer explanation

The process responsible for the transfer of energy as heat by the movement of water is convection. As the water heats up, it becomes less dense and rises, while cooler water sinks, creating a circulation pattern that distributes heat.

During a science experiment, Andrew and Isla are trying to determine the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. What is the term for this amount of energy?

• heat

• temperature

• calorie

Answer explanation

The amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius is called a calorie. This term specifically quantifies heat energy in this context.