G8 Science - PHYS

G8 Science - PHYS

By Eko Febianto

Density

Density

Density

Density

Density

Multiple Choice

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL
• 7 g/cm³
• 28 g/cm³
• 1/7 g/cm³

Multiple Choice

Look at this image.  Which object has the LOWEST density in water? How? 

• The Ping Pong Ball because it floats to the top 
• The bolt because it has sunk to the bottom
• The soda cap because it is not just full of air like the Ping Pong ball

Multiple Choice

An object should float in a liquid if it is 

• Denser than the liquid 
• Less dense than the liquid
• Lighter than metal
•  Shaped like a ball 

Pressure

Pressure

Multiple Choice

Where is pressure the greatest on the dam?

• D
• C
• B
• A

Multiple Choice

Pressure is equal to force divided by what

• area
• mass
• time
• distance

Multiple Choice

As you climb up a mountain what happens to the air pressure?

• decreases
• increases
• stays the same

Turning Force

Turning Force

Multiple Choice

What is the moment acting on the left side of the pivot?

• 2 Nm

• 20 Nm

• 200 Nm

• 0.2 Nm

Multiple Choice

A force of 4 N acts on a lever 2 m from the pivot. What is the moment?

• 8 Nm

• 6 Nm

• 2 Nm

• 3 Nm

Multiple Choice

Principle of moments states that an object is balanced when clockwise moments are equal to anticlockwise moments.

• True

• False

Static Electricity

Static Electricity

Electrical Current

Ammeter

Series VS Parallel

Multiple Choice

If an object has the same number of positive and negative charges, its electrical charge is...

• positive
• negative
• neutral or no charge
• opposite

Multiple Choice

Which one of these objects is a good insulator

• Copper wire
• Glass
• Aluminum 
• Gold

Multiple Choice

In a neutral atom, the number of electrons is equal to the number of _______.

• Neutrons
• Orbits
• Protons
• subatomic particles

Multiple Choice

If two objects with static charge are attracted, what do you know about them?

• They are both positively charged.
• They are both negatively charged.
• One is positively charged and one is negatively charged, but you won't be able to tell which is which.
• One is positively charged and one is negatively charged, and you can tell which is which by looking at them.

Multiple Choice

What is current measured in?

• Inches
• Amperes
• Centimeters
• Newtons

Multiple Choice

What is the current reading at the two question marks in the diagram?

• 12 A
• 8 A
• 4 A
• 1 A

Renewable Energy

Non Renewable Energy

Conduction

Convection

Radiation

Evaporation

Multiple Choice

What is the original source of the most of the energy that people use?

• By radiation from the sun.

• By convection from the sun.

• By radiation from the Earth's core.

• Conduction from Earth's core.

Multiple Choice

When choosing materials to build a fireplace, why is brick a better choice than metal?

• Brick is a conductor.

• Brick is heat resistant.

• Metal is a conductor.

• Meat is heat resistant.

Multiple Choice

Popcorn is made from corn kernels. What happens when kernels are heated in a microwave?

• The kernels expand.

• The kernels dissolve.

• The kernels become hard and brittle.

• The kernels stick together to form ball.

Multiple Choice

The diagram to the right shows a solid iron bar that is being heated in a flame. The primary method of heat transfer in the solid iron bar is—

• convection
• conduction
• absorption
• radiation