Grade 7 and 8 Gen Sci Proper

What is the total number of bones in the human body?

• 206
• 501
• 306
• 111

. The Earth is surrounded by an insulating blanket of gases, which protects it from the light and  the heat of the Sun. This insulating layer is called the

• Stratosphere
• Troposphere
• Atmosphere
• Hydrosphere

Name the metal which is liquid  at room temperature.

• carbon
• hydrogen
• mercury
• oxygen

The primary source of carbohydrate is:

• Animals
• Plants
• Coal Tar
• Crude oil

A push or a pull that can move an object is a __________.

• gear
• lever
• force
• machine

The SI unit for energy is...

• Kilograms
• Joule
• Meters per second
• Pounds

An example of a physical change is

• burning paper
• baking cookies
• the rusting of iron
• mixing a milkshake

An electron has a ___________ charge.

• positive
• negative
• neutral

Which type of energy does the battery produce?

• sound
• light
• mechanical
• electrical

What is the  S.I unit for measuring temperature?

• Newton
• Kilogram
• Kelvin
• Celsius