Yan Science 8

Which among the following is a NON MATTER?

• Mars

• Smoke

• Steam

• none of the choices

How many N (Newton/s) does a 1000 kg really weighs?

• 980 N

• 9800 N

• 102 N

• 0.0098 N

What makes mass and weight different?

• Mass is the amount of matter meanwhile weight is expressed in kg, lbs. and g.

• Mass and weight are expressed in g, kg and lbs.

• Mass is the amount of matter meanwhile weight is the force of gravity on an object's mass.

• none of the choices

Which of the following is being used to identify if a certain object is a matter or NOT?

• Weight

• Density

• Volume

• Mass

Neil weighs 750 N on Earth. On Mars, the force of gravity is 38% of that on Earth. How much would Neil weigh on Mars?

• 285 N

• 285 kg

• 7 350 N

• 7 350 kg

The ratio of gravitational force on Earth is 1:6. James has a mass of 84 kg on Earth. What is his mass on the moon?

• 84 kg

• 4 939 N

• 4 939 kg

• 16 N

Vaporization/ evaporation is the change of physical state from _______ to _______.

• gas to liquid

• liquid to gas

• solid to gas

• gas to solid

Dry ice on the kitchen counter has disappeared without a trace. Dry ice skips the liquid phase. It never "melts" instead turns directly into a gas. This is an example of what change of physical state?

• Sublimation

• Melting

• Condensation

• Deposition

If someone sprays perfume in front of the class, why is it that we can smell it even from the back?

• because gas has NO definite shape but takes the container's shape

• because gas has low density

• because gas has NO definite volume

• because gas can diffuse easily

It is formed by heating and ionizing a gas. Occurs only in lightning discharges and artificial devices.

• Bose-Einstein Condensate

• Plasma

• Plsama

• Plamas