Grade 2 Science Challenge

What is the main source of energy for the sun?

• Nuclear fusion

• Hydroelectric power

• Geothermal energy

• Solar wind

Which colors are considered primary colors?

• Orange

• Green

• Purple

• Red, blue, yellow

What should you do if you find a bottle labeled 'poison'?

• Avoid consuming or touching the bottle labeled 'poison', keep it away from children and pets, and dispose of it properly.

• Give it to someone as a prank

• Use it as a condiment for food

• Drink it to test if it's really poison

What is a lever and how does it work?

• A lever is a type of inclined plane that reduces friction.

• A lever is a type of wheel used to move objects vertically.

• A lever is a type of pulley that lifts heavy objects.

• A lever is a simple machine that works by applying a force to one end of a rigid bar to move an object located at the other end.

How does a pulley make work easier?

• A pulley makes work easier by generating heat and energy.

• A pulley makes work easier by changing the direction of the force applied and providing mechanical advantage.

• A pulley makes work easier by reducing the distance the force needs to travel.

• A pulley makes work easier by increasing friction and resistance.

Which type of energy is produced by moving water?

• Solar energy

• Tidal energy

• Geothermal energy

• Hydroelectric energy

Can you name the three primary colors?

• orange

• purple

• green

• red, blue, yellow

Why should you never touch toxic substances?

• To see if it's really toxic

• To test your immunity

• To impress others with your bravery

• To prevent harm or potential death.

How can you use a lever to lift a heavy object?

• Place the fulcrum farther from the heavy object and apply force on the shorter end of the lever.

• Place the fulcrum closer to the heavy object and apply force on the longer end of the lever.

• Use a lever made of a flexible material to lift the heavy object.

• Apply force on the fulcrum instead of the lever to lift the heavy object.

In what ways can a pulley be used to lift objects?

• By providing a mechanical advantage and redirecting the force needed to lift the object.

• By decreasing the number of ropes supporting the object

• By increasing the friction between the pulley and the object

• By changing the weight of the object being lifted