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Worksheets3rd PT REVIEW in Science 6
Total questions: 20
Worksheet time: 10mins
In the field of engineering, transportation, and manufacturing, understanding the nature and impact of friction is crucial. Which of the following shows that friction could be harmful?
holding a piece of paper
tearing out of bicycle gears
using breaks when stopping.
writing on the board
A ball rolled after being kicked and slowed down until it stopped. Which of the following forces caused the ball to slow downed?
electrical
friction
gravity
magnetic
Why do you need to put rollers under the cabinets when you want to move them?
to apply more force
to minimize friction through the small surface of contact of the rollers
to slow down the movement of the cabinet
to stop the movement of the cabinet
Imagine you're driving down a city street and approach a red light. How are you going to stop your moving vehicle?
Do nothing to increase the friction.
Look at the brake pedal to increase friction.
Press the brake pedal to increase friction.
Release the brake pedal to increase friction.
Imagine an astronaut floating outside the International Space Station. They have a wrench in their hand. If they release the wrench, it doesn't float away. Instead, the wrench is pulled towards the Earth by gravity. How can you describe gravity in this scenario?
A force that can be turned on and off
A force that only affects objects on Earth
A repulsive force between objects
An attractive force between objects
Why do drivers drive their car slowly during rainy days?
Drivers drive slowly because they are afraid of the rain.
Drivers drive slowly because the road is wet so there is less friction.
Drivers drive slowly because the road is wet so there is more friction.
Drivers drive slowly because the windshield is blurred.
You're holding an apple. Unconsciously, you're exerting an upward force to keep it from falling. Why do objects fall to the ground?
Because of the Earth's gravitational pull
Because they are attracted to the center of the Earth by magnetic forces
Because they are pushed by the air
Due to a mysterious force that we don't understand
Imagine two magnets. When they are close together, the magnetic force is strong. As you move them further apart, the magnetic force weakens. According to the law of universal gravitation, how does the force of gravity between two objects change?
Decreases with increasing distance
Increases with increasing distance
Is always constant
Is not affected by distance
You are watching a basketball game. How does gravity affect the movement of a ball thrown upwards by the players to shoot?
Gravity has no effect on the ball's movement.
Gravity pulls the ball downwards, causing it to eventually fall back to the ground.
Gravity pulls the ball upwards, making it go higher.
Gravity pushes the ball sideways, changing its direction.
Imagine you're hiking up a steep mountain trail. Why is it difficult for us to go up in a mountain than go down?
We are moving against gravity.
We are moving towards gravity.
We are pulled by the wind.
We are releasing energy.
Maria used her cell phone to call her mother. After a few minutes, she felt the phone getting warm. Which diagram correctly shows the energy transformation that took place?
chemical → light and sound
chemical → electrical and heat
chemical → light → sound
chemical → electrical sound → and heat
Imagine a child playing tag in the park. They're running, jumping, and laughing - full of energy! How is chemical energy important for our bodies?
It helps us breathe.
It makes us feel happy.
It protects us from disease.
It provides the energy we need to move and function.
Anie's family bought a new electric stove. The stove top had several large circles on it. When Anie's father turned on the stove, the circles glowed with a red color. What can you infer about these circles?
The circles gave off both heat and light.
The circles gave off light but not heat.
The circles gave off light to help the cook see the stove.
The circles gave off only light
A youthful cyclist is having a nice, leisurely ride on a sunny park route. What kind of energy conversion is displayed by a cyclist?
Chemical energy from food into mechanical energy of motion.
Electrical energy into heat energy.
Light energy into electrical energy.
Sound energy into potential energy.
An ultrasound produces echo which is an example of sound energy. Why is ultrasound used by hospitals and lying-in clinics?
To change the baby's position inside a mother's womb.
To give warmth to the baby inside a mother's womb.
To prevent premature delivery of the baby.
To show the developing baby inside a mother's womb.
Why is it easier to cut a piece of paper with sharp scissors than with dull scissors?
Sharp scissors are made of stronger materials
Sharp scissors create more friction.
Sharp scissors have a smaller surface area, increasing pressure.
Sharp scissors require less force to cut.
Jazmine uses a wheelbarrow to move the pile of garbage from her garden. Which type of simple machine is a wheelbarrow?
inclined plane
pulley
lever
wheel and axle
Which of these should be done with a sharp tool to prevent injuries of children?
Sharp tools and equipment should be kept inside the cabinets.
Sharp tools should be put out of reach of the children.
The children can be allowed to use knives.
The knife should be placed under the sofas and chairs.
A ramp is used to load heavy boxes onto a truck. This is an example of how a simple machine can do what?
Decrease the distance over which the work is done.
Increase the distance over which the work is done.
Increase the force needed.
Reduce the force needed.
When Mary cooks fried chicken, she uses tongs to remove the chicken from the pan. Which of the following simple machines do tongs belong?
inclined plane
lever
pulley
wheel and axle
