4th grade earth and rocks

Question 1

Which happens quickly rather than over a long time?

• A. a canyon forming
• B. a mountain wearing down
• C. a river valley widening
• D. a landslide

Question 2

On a world map, where are most earthquakes and volcanoes found?

• A. only near the North Pole
• B. only in the middle of continents
• C. in long belts along the edges of Earth's plates
• D. scattered evenly everywhere

Question 3

Which solution best reduces harm from earthquakes?

• A. ocean sensors, warning sirens and signposted routes to high ground
• B. retaining walls, drainage and planting on slopes
• C. monitoring gas and ground movement, and evacuation plans
• D. buildings with flexible frames and shock-absorbing bases

Question 4

Which type of weathering is this: tree roots growing into cracks?

• A. physical weathering
• B. chemical weathering
• C. biological weathering

Question 5

At the bottom of a lake, mud builds up about 5 cm every 100 years. A layer of mud is 50 cm thick. About how many years did it take to form?

Answer 

Question 6

A hiker is facing west and makes a half turn. Which direction is she facing now?

• A. east
• B. west
• C. north
• D. south

Question 7

A fossil is found in a layer deep below another layer. Which fossil is older?

• A. they are the same age
• B. the one in the higher layer
• C. you can never tell
• D. the one in the deeper layer

Question 8

A town is near an active volcano. Which plan would help people most?

• A. Building more homes right next to the crater
• B. Painting the volcano
• C. Ignoring warning signs
• D. Mapping danger zones and keeping clear evacuation routes

Question 9

On a map with contour lines, the lines are very close together in one place. What does this show?

• A. flat land
• B. a lake
• C. a road
• D. a steep slope

Question 10

Which order shows how a beach can form from a cliff?

• A. erosion → deposition → weathering
• B. deposition → erosion → weathering
• C. weathering → erosion → deposition
• D. deposition → weathering → erosion

Question 11

Three of these are examples of weathering. Which one is NOT?

• A. acid rain dissolving a limestone statue
• B. a boulder cracking after many hot days and cold nights
• C. tree roots growing into a rock
• D. pebbles settling at the bottom of a lake

Question 12

Which process is this: a river dropping mud at its mouth to make a delta?

• A. weathering (rock breaks down in place)
• B. erosion (pieces are carried away)
• C. deposition (pieces are dropped)

Question 13

On a map, 1 cm stands for 10 km. A volcano and a town are 8 cm apart on the map. How far apart are they in real life?

Answer km

Question 14

True or false? The ocean floor is completely flat.

• A. True
• B. False