Forces and Motion
True or False: Friction is a force that slows the movement of an object
True
A species of chicken has alleles for black (B) or white (W) feathers. Neither of these genes is dominant. Mating between a black (BB) chicken and a white (WW) chicken produces all gray (BW)offspring. If two of the gray offspring mate, what percent of their offspring can be expected to have black feathers?
25%
50%
75%
100%
What is produced when two or more elements combine in a chemical reaction?
Compound
In order (outside in), what are the four layers of the earth?
crust, mantel, outer core, inner core
Which of the following tools is most useful for tightening a small mechanical fastener: chisel, saw, pliers, or sander
Pliers
What kind of energy does a rock sitting on the edge of a ledge have?
Potential
Define evolution.
The gradual change in a species over time
2HCl + Zn ----> H2 + ZnCl2. Does the mass in the product and reactant remain the same after the chemical change?
Yes
What is the main reason water at the surface of the ocean is warmer than water at the bottom of the ocean?
Surface water absorbs more energy from the Sun
During the construction of a new building, workers dug round holes in the ground and filled the holes with steel and concrete. Which of the following parts of the building was being built during this stage of construction?
Foundation
The formula for speed is...
Sexual reproduction for some fish occurs when the female fish lays eggs and the male fish locates the eggs and fertilizes them. What is an advantage in fertilizing eggs outside the female’s body?
Fewer eggs and sperm are needed.
Many sperm can fertilize the same egg.
Many of the eggs can be fertilized at the same time.
The fertilized eggs can produce offspring identical to one parent.
C. Many of the eggs can be fertilized at the same time.
Daily Double!!!!!
*
Human activity has highly, negatively impacted the Earth's ________________ because of carbon dioxide emissions...
Atmosphere
What is the function of an encoder in a telephone communication system?
Converting sound to electrical impulses.
A toy car has a starting time and distance of 0 sec, and 0 m. The final time and distance is 6 sec and 3 m. Assuming that the car has moved at a constant speed, at what rate has it moved?
0.5 m/s
The Humboldt Redwoods State Park in California is a forest of giant coastal redwood trees that can live 2,200 years and grow to be over 100 meters tall. When such a large tree falls in the forest, it can take up to 400 years to decay. How does the decaying of a fallen redwood contribute to the health of the forest?
A. It repels earthworms and insects.
B. It provides nutrients to other organisms.
C. It shelters young plants from the sunlight.
D. It allows depleted soil to be washed away.
B. It provides nutrients to other organisms.
What unit is used to describe density?
g/cm3 (grams per centimeters cubed)
When the southern hemisphere is tilted toward the sun. What season is it in the northern hemisphere?
Winter
How would you write measurements for feet and inches using symbols.
' = feet, " = inches
If you have a graph showing how far and fast a runner ran, and there is a flat spot in the graph where time continued to move but distance did not, you can infer that:
The runner has stopped moving
A population of mice, some with light-colored fur and some with dark-colored fur, is introduced into a field with dark soil. A few generations later, the majority of the mice have dark-colored fur. Which of the following best explains this change?
A. Light-colored mice can run faster.
B. Dark-colored mice have fewer offspring.
C. Light-colored mice have changed color over generations.
D. Dark-colored mice are better able to hide from their predators.
D. Dark-colored mice are better able to hide from their predators.
You have a bucket of water that is 20*C. You place two cups into the bucket of water, one 50*C the other 10*C. How will heat be transferred between the cups and the bucket?
Heat will move out of the 50*C cup into the water bucket and heat will move into the 10*C cup from the water bucket.
What is our best evidence that continents have moved over geologic time?
Fossils of the same species have been found in unrelated places
What do both the internet and television technology have in common to reach their audience? Network signals, Printing images, Software for search engines
Network signals