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3 years ago

Past ice ages are believed to have been caused by _____.

Biology

2 answers:

MakcuM [25]3 years ago

7 0

I think your answer is A

arlik [135]3 years ago

7 0

Answer: The correct answer for the blank is- A-solar output changes and Milankovitch cycles.

An ice age can be described as a prolonged reduction in the temperature of the atmosphere and Earth's surface, which leads to the expansion of polar ice sheets.

Fluctuations in the amount of incident rays of sunlight ( incoming sunlight) is considered as the most likely reason behind changes in Earth's climate.

In other words, alteration in the duration and the intensity of heat from the sun is the cause of glacial cycles.

The Milankovich cycles occur primarily due to changes in the shape of the Earth's orbit around the sun, which relates the tilted axis of Earth.

Thus, option A) is the right answer.

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Science is ________.

stellarik [79]

Answer:

d. all of the above

Explanation:

all the above answers are correct about Science

5 0

3 years ago

masteringbio JFor each of the studies described below, indicate if it is hypothesis driven and whether the scientist is employin

juin [17]

Incomplete question. The remaining part of the question read;

Words in the left column:

Yes
No
Observational
Manipulative

1. A physiologist incubates eggs in the lab at a range of temperatures to see what temperatures produce males and what temperatures produce females.

2. A biologist predicts that shade might influence ground temperature, and therefore turtle sex ratios. He records the sex ratio of turtle hatchlings in shaded and unshaded regions

3. An ecologist predicts turtles grow larger when no predators are around. She places turtles in an experimental pond system where half the ponds have predators and half the ponds have had the predators removed.

4. A climatologist predicts that concentration of CO2 in a city will be negatively correlated with the amount of wind in that city. He collects data and looks at the amount of CO2 in a city as a function of the wind speed in the city.

5. A sociologist conducts a survey in Hawaii to describe people's attitudes about global climate change.

6. A scientist determines the average wind speed, and variation in the amount of wind, in a number of locations to see which locations would be most suitable for wind turbines

Answer/Explanation:

1. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

We can make this conclusion here that the physiologists' research is hypothesis-driven since we are told he wanted to "see what temperatures produce males and what temperatures produce females." In other words, he wanted to know whether the temperature used in incubators can influence the sex of an egg by means of observation.

2. Hypothesis-driven? Yes!

Observational or Manipulative? Observation.

3. Hypothesis-driven? Yes!

Observational or Manipulative? Manipulative.

We can make the conclusion that is the ecologist used the manipulative method in her research since she decided to place the turtles in two different types of ponds; one where half the ponds have predators while in the other the pond the predators have been removed. In other words, she manipulated the independent variables.

4. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

Note, the use of the word, "predicts" in most instances underscores the tone of hypothesis-driven research, hence we can say Yes! And remember, we are told the researcher "collects data", meaning he is merely observing differences that occur naturally.

5. Hypothesis-driven? No!

Observational or Manipulative? Observational.

6. Hypothesis-driven? No!

Observational or Manipulative? Observational.

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3 years ago

Name 2 reasons it may be important for humans to know when a high or low tide is

Alja [10]

Answer:

Here's what i think.

Explanation:

Tides can be extremely dangerous, in some places, high tide will flood caves which people otherwise wouldn't notice as flood-able. Knowing the tides can save lives of Spelunkers (people who explore caves). Another example is sailing. The tides can be important because tide can determine if your boat will be smashed against rocks, or if it is safe to dock!

4 0

3 years ago

HELP PLEASE SHOW WORK

Goshia [24]

Answer:

1. 46grams

2. 5moles

3. 476 atoms

4. 6,995,268

7 0

2 years ago

Can someone help me with this question

Alex_Xolod [135]

Answer:

A segment of DNA

6 0

3 years ago

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