Science MPT Quarter 4 Practice

Front

What are convection currents?

Back

Convection currents are the movement of fluid caused by the heating and cooling of the fluid. As a fluid is heated, its molecules spread out, making it less dense and causing it to rise, while cooler, denser fluid sinks, creating a continuous circulation pattern.

Front

Why do high pressure systems move towards low pressure systems?

Back

High pressure systems push harder against low pressure systems due to differences in pressure. This movement is driven by the natural tendency of fluids to move from areas of high pressure to areas of low pressure.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties. An example is a copper penny turning greenish due to oxidation.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include changes in state, such as melting or freezing.

Front

How many areas of low pressure are typically found on a weather map?

Back

The number of low pressure areas can vary, but in the context of the provided question, there are 9 areas of low pressure.

Front

How do mountain ranges affect climate?

Back

Mountain ranges can affect climate by forcing air masses upwards, which generally cools the air and can lead to precipitation on the windward side.

Front

What is density?

Back

Density is the mass of a substance divided by its volume. It determines whether an object will float or sink in a fluid.

Front

What is the difference between a solid, liquid, and gas?

Back

Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a definite shape nor volume.

Front

What is the water cycle?

Back

The water cycle is the continuous process by which water moves from the Earth's surface to the atmosphere and back, involving processes like evaporation, condensation, and precipitation.

Front

What is the role of the sun in weather patterns?

Back

The sun provides energy that drives weather patterns by heating the Earth's surface, causing air to rise and create wind and weather systems.