Question 1

1 out of 1 points

Impact craters are caused by
Selected Answer:  

meteor or other projectile impact

Answers: tectonic movement in the crust
erosion by wind or water
volcanic processes
 

meteor or other projectile impact

  • Question 2

1 out of 1 points

A meteor about the size of a house can make a crater that is
Selected Answer:  

about 3/4 of a mile across

Answers: also about the size of a small house
about 125 miles across
 

about 3/4 of a mile across

6000 miles across
  • Question 3

1 out of 1 points

The asteroid that is credited with causing the extinction of the dinosaurs was about the size of
Selected Answer:  

Mount Everest

Answers: the average width of the Grand Canyon
a school bus
a small house
 

Mount Everest

  • Question 4

0 out of 2 points

The term “age” referring to a surface on a planet refers to
Selected Answer:  

how long ago the planet formed

Answers: how old the planet is with respect to the Earth
how long ago the planet formed
how old the planet is with respect to the universe
 

how recently something happened to change the surface

  • Question 5

2 out of 2 points

In this lab you will estimate age of a surface by measuring
Selected Answer:  

crater density vs. crater diameter

Answers:  

crater density vs. crater diameter

crater density vs. crater height
crater height vs. crater of diameter
number of preserved craters vs. number of eroded craters
  • Question 6

2 out of 2 points

The oldest surfaces are expected to have
Selected Answer:  

higher densities of both large and small craters than younger surfaces

Answers: higher densities of large craters than younger surfaces but relatively few small craters
lower densities of both large and small craters than younger surfaces
higher densities of small craters than younger surfaces, but about the same number of large craters
 

higher densities of both large and small craters than younger surfaces

  • Question 7

0 out of 1 points

Using the crater dating method, which of the following has the overall “youngest” appearing surface?
Selected Answer:  

Mercury

Answers:  

Earth

Earth’s Moon
Mars
Mercury

 

  • Question 1

1 out of 2 points

The relationship between the force of gravity, the masses of two objects, and their distance apart is
Selected Answer:  

a mathematical model that completely explains gravity.

Answers: a mathematical model that completely explains gravity.
not a model because it involves only numbers and letters not a scaled system.
 

an example of a mathematical model of the attraction between two objects.

an unreliable representation of the world that needs major modifications.
  • Question 2

0 out of 2 points

At the latitude of GMU (about 39 degrees north),the Sun is directly overhead
Selected Answer:  

only on the dates of the equinoxes

Answers: only on the dates of the equinoxes
every day at noon
on the summer solstice
 

never

  • Question 3

1 out of 1 points

As it approaches perihelion the speed of a planet
Selected Answer:  

is increasing

Answers: is decreasing
has its lowest speed
remains the same
 

is increasing

  • Question 4

0 out of 1 points

All planets in the solar system orbit the Sun which is at
Selected Answer:  

at the crossing point of the major and minor axes

Answers: at the crossing point of the major and minor axes
 

one of the focal points for each planet’s elliptical orbit

a focal point that sifts as the planet orbits
at the center of each of the orbits
  • Question 5

1 out of 1 points

When you push a pencil off the table and it begins to fall to the floor its
Selected Answer:  

potential energy is converted to kinetic energy as it falls

Answers: its kinetic energy is converted to potential energy as it falls
 

potential energy is converted to kinetic energy as it falls

its chemical energy is converted to kinetic energy as it falls
its chemical energy is converted to potential energy as it falls
  • Question 6

0 out of 1 points

One way to define mass of an object is to say it is
Selected Answer:  

how much the object weighs

Answers: how big the object is
 

how much the object resists motion

 

how much the object weighs
how fast the object can go
  • Question 7

2 out of 2 points

Put the following steps in star and planet formation in the correct order
Answers Selected Answer
1.

Cloud of interstellar gas begins to collapse underits own gravity

1.

Cloud of interstellar gas begins to collapse underits own gravity

2.

Material cascades inward, landing on a thin, rotating accretion disk

2.

Material cascades inward, landing on a thin, rotating accretion disk

3.

Planetesimals form and begin to attract nearby bodies

3.

Planetesimals form and begin to attract nearby bodies