7th grade science semester exam part 2 study cards

Question 1

Which of the following methods uses the decay of atomic particles in an object to find its exact age?

Fossil Dating; Geological Dating; Radioactive Dating; Relative Dating

Answer 1

Radioactive Dating

Question 2

Which of these is an advantage of using models to study tectonic plate movements?

Actual plate movements can be stopped; Actual plate movements can be made less frequent; Models of the exact material as original can be made; Observations can be made from outside the system

Answer 2

Observations can be made from outside the system

Question 3

Which of these best describes Earth’s mantle?

Most dense layer, consists of the outer and inner parts; Thinnest under the oceans and thickest under continents; Middle layer, density increases with depths as pressure increases; Least dense layer overall, consists of two layers of different thicknesses

Answer 3

Middle layer, density increases with depths as pressure increases

Question 4

The characteristics of the two layers of Earth’s crust are listed.

Layer A: Made of iron and nickel and responsible for Earths magnetic field
Layer B: Made mostly of solid iron

Layer A is the crust and layer B is the mantle, Layer A is the mantle and Layer B is the crust, Layer A is the outer core and Layer B is the inner core, Layer A is the inner core and Layer B is the outer core

Answer 4

Layer A is the outer core and Layer B is the inner core

Question 5

What type of plate boundary interactions takes place when tectonic plates slide past each other?

Convergent boundaries, Divergent boundaries, Subduction boundaries, Transform boundaries

Answer 5

Transform boundaries

Question 6

The chart below shows the depths at which an index fossil and 3 other fossils were found.

Fossil Depth (meters)
A : 320
B : 380
C : 500
Index fossil : 380

Which statement is correct?

The index fossil is the oldest fossil; The index fossil is the youngest fossil; Fossil A is the same age as the index fossil; Fossil B is the same age as the index fossil

Answer 6

Fossil B is the same age as the index fossil

Question 7

The peppered moth population in a locality has light and dark moth varieties. The tree barks in the locality are covered with light-colored lichens. How would the population of the two moth varieties change over time?

Dark moth population increases as they preyed upon less frequently; Light moth population increases as they are preyed upon less frequently; Dark moth population decreases as they blend in with their surroundings; Light moth population decreases as they blend in with their surroundings

Answer 7

Light moth population increases as they are preyed upon less frequently

Question 8

Which part of an apple best represents Earth’s inner core?

Flesh; Seeds; Skin; Stem

Answer 8

Seeds

Question 9

Which of these best explains why the asthenosphere is always in motion?

Cooling causes expansion and shifting of the fluid particles; Cooling causes contraction and shifting of the fluid particles; Heat makes the semi-fluid particles sink down and then rise up on cooling; Heat makes the semi-fluid particles rise up and then come down on cooling

Answer 9

Heat makes the semi-fluid particles rise up and then come down on cooling

Question 10

Which of the following is the rigid, solid layer of the upper mantle that is connected to the crust?

Asthenosphere; Atmosphere; Lithosphere; Mesosphere

Answer 10

Lithosphere

Question 11

What type of volcano will most likely form when quiet eruptions gradually build up a gently sloping mountain?

Cinder volcano, Composite volcano, Cone volcano, Shield volcano

Answer 11

Shield volcano

Question 12

The chart below shows the number of foot bones in some horse fossils.

                             Horse Fossil Record
      Horse Fossil                           Number of Foot Bones
             P :                                                        19
             Q :                                                       17
             R :                                                       24
             S :                                                        13

Ancient horses had more bones in their foot then present-day horses. The present-day horse has 11 foot bones. What is the correct order of evolution to the horse starting from the youngest fossil?

Answer 12

S
Q
P
R

Question 13

Which adaptation is likely to increase the chances of survival of an animal in hot arid climates?

Capacity to store body fat to survive periods of food shortage; Brown skin color to increase water loss from the body; Cuticle over skin to increase water loss from the body; Light skin color to survive periods of food shortage

Answer 13

Capacity to store body fat to survive periods of food shortage

Question 14

Wegener observed that the coastlines of continents in the Southern Hemisphere had similar grooves. Which of the following supports coastlines far away from one another having similar grooves?

Animal extinction; Glacial movement; Rock formation; Human interaction

Answer 14

Glacial movement

Question 15

The fossils found in the different layers of Earth are listed below.

Top layer: Fossil A
Bottom layer: Fossil B
Second layer from top: Fossil C
Third layer form top: Fossil D

Which fossil is the oldest?
Fossil A, Fossil B, Fossil C, Fossil D

Answer 15

Fossil B

Question 16

Jack rolled a marble down a ramp and recorded the potential energy and kinetic energy of the marble at different positions on the ramp, as shown in the chart below.

Trial 1:
Height of Marble from Ground (meters) : 1
Potential Energy of Marble (Joules) : 1
Kinetic Energy of Marble (Joules) : 3
Total Energy of Marble (Joules) : 4

Trial 2:
Height of Marble from Ground (meters) : 2
Potential Energy of Marble (Joules) : 3
Kinetic Energy of Marble (Joules) : 1
Total Energy of Marble (Joules) : 4

Which of these is the test variable (independent variable) in this experiment?
Mass of marble; Kinetic energy of marble; Potential energy of marble; Height of marble from ground

Answer 16

Height of marble from ground

Question 17

Which of the following is most likely to occur at a divergent boundary?

Mountain formation, Seafloor spreading, Faults, Subduction zones

Answer 17

Seafloor spreading

Question 18

What is the similarity between relative dating and radioactive dating?

Both study the decay of atomic particles; They both determine the exact age of rocks; Both are used to determine the age of objects; They both provide a range of years of an object

Answer 18

Both are used to determine the age of an object