Forces
What type of friction acts on objects in motion?
kinetic friction
True or False: Vector quantities have only magnitude, whereas scalar quantities have both magnitude and direction.
false, scalar quantities have only magnitude and vector quantities have both magnitude and direction
What is the rate at which work is done? (work/time)
power
What is the name of the process where a rock is broken down into smaller pieces?
weathering
What is the water on the surface of the Earth called?
surface water
What is the name of the force that pulls objects towards the Earth?
gravitational force
Is distance a vector or scalar quantity?
scalar
How much work is done when someone pushes a box 5 m with a force of 10 N?
50 J
What is it called when sediments are dropped?
deposition
What is the gradual sinking of the ground due to removal of groundwater called?
land subsidence
Which has a greater moment of force: a longer spanner or a shorter spanner?
a longer spanner
If a car travels 500 meters and returns to its starting point in 100 seconds, what is the average velocity of the car?
0 m/s
What class of lever has the fulcrum in the middle of the lever? (first class, second class, or third class)
first class
Name two factors that affect soil formation.
parent material, climate, topography, biotic, time
What is the movement of rock and soil down a slope called?
landslide
If the coefficient of friction (𝜇) between a block and surface is 0.1, and the normal force is 30 N, calculate the frictional force.
3 N
A car covers a distance of 150 kilometers in 3 hours. For the first 2 hours, the car traveled at 55 km/h. What was the cyclist's speed for the last hour?
40 km/h
What is the gravitational potential energy of an object that weighs 5 N and is 2 m above the ground?
10 J
List the soil profiles in order from top to bottom.
Horizon O, Horizon A, Horizon B, Horizon C, Horizon R
Why do urban areas experience more surface water flooding?
they have more pavement which does not absorb water
A force of 40 N is applied 10 cm from the pivot of a spanner. What is the moment of force?
4 Nm
From their starting point, a cyclist rides 200 m West, then 400 m North, then 200 m East. What is their distance and displacement?
distance = 400 m North, displacement = 800 m
As a book falls from a shelf, gravitational potential energy is converted into what kind of energy?
kinetic energy
Name one disadvantage of fossil fuels.
non-renewable energy sources, global warming, pollution
Name three hazards caused by water.
landslides, surface water flooding, soil erosion, sinkholes, land subsidence