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
• 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?

• 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