1.
What is mass?
Correct Answer
B. Total amount of matter in an object
Explanation
The correct answer is "Total amount of matter in an object." Mass refers to the total amount of matter present in an object, regardless of its volume or shape. It is a fundamental property of matter and is measured in units such as kilograms or pounds.
2.
Weight Changes.
Correct Answer
A. True
Explanation
The explanation for the correct answer "True" is that weight changes are a natural occurrence in life. People's weight can fluctuate due to various factors such as diet, exercise, hormonal changes, and overall health. It is common for individuals to experience weight gain or loss over time. Therefore, it can be concluded that weight changes are indeed true.
3.
The mass of an object stays the same. ____________depends on gravity and it can change.
Correct Answer
Weight, weight
Explanation
Weight is the force exerted by gravity on an object's mass. Since gravity varies depending on location—being different on the Moon, Earth, or Mars, for example—an object’s weight can change depending on where it is measured. Mass, however, is a constant property and does not change regardless of location.
4.
What is volume?
Correct Answer
C. Total amount of space matter takes up
Explanation
The correct answer is "Total amount of space matter takes up." Volume refers to the measure of the amount of space occupied by an object or substance. It is a physical property that is used to quantify the three-dimensional space that an object occupies. The volume of an object can be calculated by measuring its dimensions such as length, width, and height, or by using displacement methods. In this context, the other options - total matter in an object and density - do not accurately define volume.
5.
What is weight?
Correct Answer
C. Force of gravity pulling to the center of Earth
Explanation
Weight is the measure of the force of gravity acting on an object. It is the result of the gravitational attraction between the object and the Earth. The force of gravity pulls objects towards the center of the Earth, causing them to have weight. Therefore, the correct answer is "Force of gravity pulling to the center of Earth."
6.
What is the principle behind using a water displacement method to determine the volume of an irregular object?
Correct Answer
C. Archimedes' principle
Explanation
Archimedes' principle states that an object submerged in a fluid experiences a buoyant force equal to the weight of the fluid displaced by the object. This principle is used to determine the volume of an irregular object by measuring the volume of water it displaces when submerged.
7.
Which unit is not a standard unit of mass in the metric system?
Correct Answer
C. Pound
Explanation
The pound is a unit of mass used in the imperial system and is not part of the metric system, which primarily employs grams, kilograms, and milligrams as its units for measuring mass. In the metric system, the kilogram serves as the fundamental unit of mass, standardizing measurements across scientific and commercial fields globally.
8.
If the mass of an object is 20 kg on Earth, what would be its mass on the Moon?
Correct Answer
A. 20 kg
Explanation
Mass is indeed an intrinsic property of an object, meaning it does not change regardless of where the object is located or under what gravitational conditions it exists. Whether an object is on Earth, the Moon, or any other celestial body, its mass remains the same because mass is a measure of the amount of matter in an object, not influenced by gravity. However, weight, which is the force exerted by gravity on that mass, varies depending on the gravitational pull of the planet or moon where the object is present
9.
Which scenario best illustrates the difference between mass and weight?
Correct Answer
B. An object weighs less on the Moon than on Earth.
Explanation
This scenario highlights the difference between mass (a constant property of matter) and weight (a force that depends on gravity). An object's mass remains the same regardless of location, but its weight decreases on the Moon compared to Earth due to the Moon's weaker gravitational pull.
10.
How does the volume of a substance generally change with temperature increase?
Correct Answer
C. Volume increases
Explanation
For most substances, the volume typically increases as temperature rises due to thermal expansion. Molecules move faster and tend to spread apart as they gain kinetic energy, resulting in an increase in volume. Exceptions include water below 4 degrees Celsius, where it behaves non-typically.