2024 | Natural Sciences | Test 1

Which material is considered an excellent conductor of heat?

Insulators are materials that transfer heat easily.

What is the process of heat transfer that occurs between solid objects in direct contact called?

Metals like copper and aluminum are known as __________ because they transfer heat quickly.

Match the following materials with their classification:

What is the primary method of heat transfer described in the activities?

In convection, cold particles move upwards while hot particles move downwards.

What are two examples of convection affecting daily life?

Convection currents occur when _____ and _____ are transferred by the movement of particles.

Match the convection scenarios with their descriptions:

What happens to the particles of a fluid when it is warmed up?

Convection currents occur when cooler fluid sinks and warmer fluid rises.

What is convection?

The circular movement of fluids caused by convection is known as a __________.

Match the following terms with their definitions:

What is the key role of fire in keeping homes warm?

Radiation requires contact with matter to transfer heat energy.

Give an example of radiation that you experience in daily life.

Traditional healers rely on sunlight to dry the ______ needed for medicine preparation.

Match the following items with their importance to traditional healers:

In the Peanut and Marshmallow Experiment, what is the independent variable?

What is the dependent variable in the Black Mat and Silver Mat Experiment?

Fixed variables are those that are changed during an experiment.

Name one control variable in the Peanut and Marshmallow Experiment.

The variable that is measured during the experiment is known as the ______.

In an experiment, the variable that the researcher changes is called the ______.

Match the variable types with their correct definitions:

In any experiment, all variables can be modified freely to observe any changes.

Which statement best explains why the bottle wrapped in black cloth heats up more than the one wrapped in silver cloth?

Radiation is the transfer of heat that requires physical contact between two materials.

What is the main method by which heat from the Sun travels to Earth?

If you lived in a hot area, you would not buy a __________ car due to its tendency to absorb heat.

Match the following items with their characteristics related to heat absorption:

Which type of heat energy transfer allows traditional healers to prepare their medicine?

White objects absorb radiation waves more effectively than black objects.

What process occurs when light strikes a surface and disappears, transferring energy as heat?

On a sunny day, the inside of a _____ car will be cooler than the inside of a black car parked in the same spot.

Match the color of the objects with their heat absorption characteristics:

What is the primary means by which the Sun's heat energy travels to Earth?

Radiation requires physical contact for heat transfer to occur.

How do hot objects transfer heat energy through radiation?

Radiation can transfer heat in a __________, a space where there is no matter.

Match the following examples of radiation with their descriptions:

What is the independent variable in an experiment?

A control variable is changed throughout an investigation to ensure accurate results.

What is the term for the variable that is measured or observed in response to the independent variable?

In an investigation, the variable that remains the same is known as the __________.

Match the following terms with their definitions:

What is the primary mechanism of heat transfer when holding a hot mug of tea?

Insulating materials, such as thick clothing, help to increase the transfer of heat from the body to the environment.

Name one example of heat energy transfer in the home.

Heat energy transfers from the hot coffee to the cup and spoon through __________.

Match the following examples with their descriptions: