1.
Which of the following words or phrases describes a solid?
Correct Answer
C. Hard
Explanation
The word "Hard" describes a solid because solids have a rigid and firm structure that is difficult to deform or change shape. Solids maintain their shape and volume, unlike liquids or gases.
2.
Which of the following words or phrases describes a liquid?
Correct Answer
A. Fixed volume
Explanation
The term "fixed volume" describes a liquid because liquids have a definite volume that remains constant regardless of the container they are in or the amount of liquid present. Unlike gases, which can expand or contract to fill the entire volume of a container, liquids maintain their volume and do not easily compress. Therefore, "fixed volume" is an appropriate description for a liquid.
3.
Which of the the following describes a gas?
Correct Answer
D. Low density
Explanation
A gas is described as having low density because gases are composed of particles that are spread out and have a lot of empty space between them. This allows gases to be easily compressed and have a low mass per unit volume compared to liquids and solids.
4.
Which of the following does NOT describe gases:
Correct Answer
B. Do not flow
Explanation
Gases do not have a fixed shape, meaning they can expand and contract to fill the space available to them. They also do not have a fixed volume, as they can expand or compress depending on the conditions. Gases have low density compared to solids and liquids. Additionally, gases spread out to fill the container they are in, taking the shape of the container. However, gases do flow, meaning they can move from one place to another.
5.
Which of the following does NOT describe solids:
Correct Answer
A. Easily compressed
Explanation
Solids cannot be easily compressed because the particles in a solid are tightly packed together, resulting in a fixed volume and shape. Unlike gases or liquids, solids have a high density and their particles do not have the ability to move freely. Therefore, the statement "easily compressed" does not describe solids.
6.
Which of the following do NOT describe liquids:
Correct Answer
C. Less dense than gases
Explanation
Liquids are not less dense than gases. Density is a measure of how closely packed the particles are in a substance. Liquids have a higher density compared to gases because their particles are closer together. This is why liquids have a fixed volume, as the particles are tightly packed and cannot be compressed easily. Liquids also do not have a fixed shape and usually flow freely, which distinguishes them from solids.
7.
What happens to a bag containing a gas? Click the correct description.
Correct Answer
A. The bag gets smaller but you don't see anything
Explanation
When a bag containing a gas is compressed, the gas molecules are forced closer together, causing the bag to decrease in size. However, since gas is invisible, you wouldn't be able to see the gas itself. Therefore, the correct answer is that the bag gets smaller but you don't see anything.
8.
Sand is a liquid.
Correct Answer
B. False
Explanation
Despite sand being able to flow, each individual sand grain is a solid.
9.
The phrase "easily compressed" means:
Correct Answer
B. The material is easily squashed
Explanation
The phrase "easily compressed" means that the material can be easily squashed or compressed, indicating that it can be easily reduced in volume or size under pressure. This suggests that the material is not resistant to external force and can be easily compressed or squeezed together.
10.
Toothpaste is a...
Correct Answer
B. Liquid
Explanation
This answer is incorrect. Toothpaste is not a liquid, but rather a semi-solid or gel-like substance. It is composed of a combination of solid and liquid ingredients, such as abrasives, binders, and water. Although toothpaste may have a slightly liquid-like consistency, it does not have the properties or behavior of a true liquid.
11.
Which of the following are liquids?
Correct Answer(s)
B. Treacle
E. Wet Mud
Explanation
Treacle is a thick, sticky syrup that is commonly used in cooking. It is a liquid because it can flow and take the shape of its container. Wet mud is also a liquid because it is a mixture of water and soil, which can flow and has a definite volume but not a definite shape. Sponge, jelly, and sand are not liquids as they do not flow and cannot take the shape of their containers.