BYU EARTH SCIENCE FINAL
EXAM STUDY GUIDE
A student collects the following data in a pond ecosystem. Which data
represents an abiotic factor? - ANSWERS-The pH, or acid level, in
the pond is 6.3. Pure water has a pH of 7
Why should experiments have at least two groups? - ANSWERS-The
control group is a comparison group. We can see if the factor we
changed, our experimental variable, had any effect
What is the process that utilizes sunlight to manufacture food
molecules? - ANSWERS-photosynthesis
In the food chain grass => grasshopper => bird, the grasshopper
would occupy which trophic level? - ANSWERS-first consumer level
In the food chain grass => grasshopper => bird, which level would the
bird occupy? - ANSWERS-second consumer level
What type of a factor would dead wood lying on a forest floor be? -
ANSWERS-biotic
In the question above, Student A said, "We must maintain biodiversity
because we need food crops, and we need medicines that come from
rain forest animals and plants." Which question below would help to
,scientifically evaluate the accuracy of the statement? - ANSWERS-
What are some examples of medicines and foods that come from the
rain forest?
Which student makes the best case? - ANSWERS-Student B: It
benefits us since natural processes protect our planet. Diversity also
provides food, clothing, and medicines for the humans. It also
provides food, shelter, and habitat for all other living things. It keeps
the earth beautiful and makes life more worthwhile.
The Giant Panda's current wild population is estimated to be two
thousand. How does this fact impact the risk of extinction for the
Giant Panda? - ANSWERS-Since the panda's population is very
limited, its risk of extinction is greater.
Which of the following decreases the risk of extinction for the polar
bear? - ANSWERS-Government regulations and quotas limit the
amount of hunting of polar bears possible.
What fact increases the risk of extinction for polar bears? -
ANSWERS-Polar Bears have few offspring
Of the four Earth biomes shown below, which has the coldest average
temperatures? - ANSWERS-tundra
Of the four Earth biomes listed below, which has the greatest
biomass? - ANSWERS-rainforest
, What is the estimated yearly extinction rate caused by human
activity? - ANSWERS-20,000- 50, 000
Of the four Earth biomes shown below, which has the greatest
rainfall? - ANSWERS-rainforest
Which is a natural cause of large scale extinction? (That is an
extinction where a major percentage of the species of Earth die out.) -
ANSWERS-Sudden climate change
.
It is believed that an asteroid or comet impact caused the extinction of
the dinosaurs 65 million years ago. What are the two major lines of
evidence supporting this theory? - ANSWERS-There is a layer of clay
at the time of the dinosaurs with high concentration of iridium from
asteroids in it, and scientists have found a large impact crater that hit
Earth 65 million years ago.
Which region described below would likely have the smallest
biomass? - ANSWERS-Region A
slow reproduction rate;nutrient-poor soils;few producers;little rainfall
How has human-caused extinction occurred? - ANSWERS-Humans
have over-hunted and killed species for food.
Humans have occupied more space causing habitat loss for many
organisms.
EXAM STUDY GUIDE
A student collects the following data in a pond ecosystem. Which data
represents an abiotic factor? - ANSWERS-The pH, or acid level, in
the pond is 6.3. Pure water has a pH of 7
Why should experiments have at least two groups? - ANSWERS-The
control group is a comparison group. We can see if the factor we
changed, our experimental variable, had any effect
What is the process that utilizes sunlight to manufacture food
molecules? - ANSWERS-photosynthesis
In the food chain grass => grasshopper => bird, the grasshopper
would occupy which trophic level? - ANSWERS-first consumer level
In the food chain grass => grasshopper => bird, which level would the
bird occupy? - ANSWERS-second consumer level
What type of a factor would dead wood lying on a forest floor be? -
ANSWERS-biotic
In the question above, Student A said, "We must maintain biodiversity
because we need food crops, and we need medicines that come from
rain forest animals and plants." Which question below would help to
,scientifically evaluate the accuracy of the statement? - ANSWERS-
What are some examples of medicines and foods that come from the
rain forest?
Which student makes the best case? - ANSWERS-Student B: It
benefits us since natural processes protect our planet. Diversity also
provides food, clothing, and medicines for the humans. It also
provides food, shelter, and habitat for all other living things. It keeps
the earth beautiful and makes life more worthwhile.
The Giant Panda's current wild population is estimated to be two
thousand. How does this fact impact the risk of extinction for the
Giant Panda? - ANSWERS-Since the panda's population is very
limited, its risk of extinction is greater.
Which of the following decreases the risk of extinction for the polar
bear? - ANSWERS-Government regulations and quotas limit the
amount of hunting of polar bears possible.
What fact increases the risk of extinction for polar bears? -
ANSWERS-Polar Bears have few offspring
Of the four Earth biomes shown below, which has the coldest average
temperatures? - ANSWERS-tundra
Of the four Earth biomes listed below, which has the greatest
biomass? - ANSWERS-rainforest
, What is the estimated yearly extinction rate caused by human
activity? - ANSWERS-20,000- 50, 000
Of the four Earth biomes shown below, which has the greatest
rainfall? - ANSWERS-rainforest
Which is a natural cause of large scale extinction? (That is an
extinction where a major percentage of the species of Earth die out.) -
ANSWERS-Sudden climate change
.
It is believed that an asteroid or comet impact caused the extinction of
the dinosaurs 65 million years ago. What are the two major lines of
evidence supporting this theory? - ANSWERS-There is a layer of clay
at the time of the dinosaurs with high concentration of iridium from
asteroids in it, and scientists have found a large impact crater that hit
Earth 65 million years ago.
Which region described below would likely have the smallest
biomass? - ANSWERS-Region A
slow reproduction rate;nutrient-poor soils;few producers;little rainfall
How has human-caused extinction occurred? - ANSWERS-Humans
have over-hunted and killed species for food.
Humans have occupied more space causing habitat loss for many
organisms.
