Grade_8_Science_Tamkeen Exam Practice

Which of the following does not represent a force pair?

• When an ice skater pushes off a wall, the wall pushes the skater off the wall

• When a diver jumps off a diving board, the board pushes the diver up

• When you push on a bike's brakes, the friction between the tires and the road increases

• When a boy pulls a wagon, the wagon pulls back on the boy

Which of the following statements is correct regarding the car motion from point A to point D on the. racetrack model shown below?

• The car's distance is 800 m, and its displacement is 300.0 m

• The car's distance is 1200 m, and its displacement is 400.0 m

• The car's distance is 1200 m, and its displacement is 364.0 m

• The car distance is equal to its displacement

Which geological principle must be assumed to determine the relative age of M

• Superposition

• Cross-cutting relationships

• Inclusions

• Original horizontally

Which type of potential energy is stored in the spring shown in the figure below?

• Magnetic potential energy

• Gravitational potential energy

• Electric potential energy

• Elastic potential energy

The plot below shows the motion of an elevator, it's a distance (m) vs. time (min) graph. Which of the following statements is correct?

• In the interval B —> C the elevator was moving at a constant speed

• In the interval A —> B the elevator was at the highest speed during its entire motion

• In the interval C —> D the elevator was standing still (stopped, not moving)

• In the interval F —> G the elevator returned back to the start point

Match between the fossil type and the example figure in front of it?

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Which of the following is NOT a benefit of genetically modified organism (GM0s)?

• Developing crops that mate re faster arid can rip after picked

• Resistance to particular insects, pests, and disease

• Reduce cost and increase the amount of corps picked

• Heath risks from the consumption of genetically modified corps

The diagram below shows a segment of DNA before and after replication.which of the following could have occurred as a resuft of this change in structure?

• i & iii only

• i only

• i & ii only

• i, ii & iii

The graph below shows even-toed hoofed mammals and other mammals shared a common ancestor. When did this ancestor live?

• 75 million years ago

• 25 million years ago

• 60 million years ago

• 50 million years ago

Which type of Unconformity is shown below

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