Grade 8 Accel Review

In sexually reproducing organisms, such as humans, which of the following statements is TRUE about the genetic information that is passed from parents to children?

• All of the genetic information comes from one of the parents.
• Half of the genetic information comes from each of the parents.
• Some of the genetic information comes from each of the parents, but the amount that comes from each parent cannot be predicted.
• Sons receive most of their genetic information from their fathers, and daughters receive most of their genetic information from their mothers.

The eye color of children often resembles the eye color of their parents. Which of the following is genetically passed from parents to children?

• Particles of color are passed from parents to children.
• Cells that become the colored part of the eye are passed from parents to children.
• Molecules that contain the information that determines eye color are passed from parents to children.
• Nothing having anything to do with eye color is passed from parents to children.

When the engines on a rocket ship in deep space, far from any other objects, are turned off, it will

• slow down and eventually stop
• stop immediately
• turn right
• move with constant velocity
• turn left

Which of the following is a vector quantity?

• speed
• time
• velocity
• distance
• position

Use the graph to determine the acceleration during the last 5 seconds.

• 0 m/s2
• 1 m/s2
• 4 m/s2
• 9 m/s2
• 20 m/s2

A football, a hockey puck, and a tennis ball all fall down in the absence of air resistance. Which of the following is true about their acceleration?

• The acceleration of the football is greater than the other two
• The acceleration of the hockey puck is greater than the other two
• The acceleration of the tennis ball is greater than the other two
• They all fall down with the same constant acceleration
• More information is required

The diagram illustrates a car that, starting from the origin, travels 4 km east and then 7 km west. What is the net displacement of the car from the initial point?

• 3 km, west
• 3 km, east
• 4 km, east
• 7 km, west
• 7 km, east

An object moves with a constant acceleration of 5 m/s2. Which of the following statements is true?

• The object’s velocity stays the same
• The object moves 5 m each second
• The object’s acceleration increases by 5 m/s2 each second
• The object’s acceleration decreases by 5 m/s2 each second
• The object’s velocity increases by 5 m/s each second

A brick is sliding to the right on a horizontal surface. What are the directions of the two surface forces (frictional and normal) acting on the object?

• Right, up
• Left, up
• Right, down
• Left, down

A train moves at a constant velocity of 50 km/h. How far will it move in 0.5 h?

• 10 km
• 20 km
• 25 km
• 45 km
• 50 km