Science UIL Practice 22-23 pt 1

Front

What is the mass number of an atom?

Back

The mass number of an atom is the total number of protons and neutrons in its nucleus.

Front

What particles are found in a neutral atom?

Back

A neutral atom contains protons, neutrons, and electrons, with the number of protons equal to the number of electrons.

Front

What causes mountain ranges like the Alps to increase in elevation?

Back

Mountain ranges increase in elevation due to the motion of tectonic plates.

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What happens when a solid dissolves in a liquid?

Back

When a solid dissolves in a liquid, it breaks down into smaller particles that become evenly distributed throughout the liquid.

Front

What is buoyancy?

Back

Buoyancy is the ability of an object to float in a fluid, determined by the density of the object compared to the density of the fluid.

Front

What is the relationship between temperature and the density of gases?

Back

As temperature increases, the density of gases generally decreases because the gas expands.

Front

What are the characteristics of main sequence stars?

Back

Main sequence stars, like our sun, are in a stable phase of stellar evolution where they fuse hydrogen into helium in their cores.

Tags

NGSS.HS-ESS1-1

Front

What color do older stars tend to appear?

Back

Older stars generally tend to appear red due to their cooler temperatures.

Front

What is the significance of a star's color in relation to its temperature?

Back

A star's color indicates its temperature; blue stars are very hot, while red stars are cooler.