Answer:
I would say around the 11th or 12th hour
Explanation:
seeing as the question calls for ALL of earth's history compressed into 12 hours the timeline should be similar to this: Earth was born at midnight, at around 2-3 AM land masses form, Right after that, life begins, For around 8 hours (11 PM) life is confined in water, right after that we have plants, 22 minutes later we have dinosaurs, 22 minutes later we have mammals, 5 minutes later dinosaurs are extinct, 6 minutes later we have people. So it's most likely the 12th hour. I hope this helps.
If you start with 5.5 liters of hydrogen peroxide (H2O2), how many molecules of oxygen gas (O2) will be produced?
Answer:
2.75 mol O2
Explanation:
2 H2O2 = 2 H2O + O2 is the formula
heres a picture of the work
Describe the concentration of hydronium ions and hydroxide ions when a base is added slowly to a white vinegar solution. The pH of white vinegar is 3.1. Explain
Answer:as you add the base it added some PH. The Ph lever of white winegaer is2.4 - 3.4
Explanation:
1. What is the geologic time scale? Explain how the geologic time scale is a model.
2. How many millions of years was the Paleozoic?
3. During what era did the dinosaurs live?
4. During what period where the first early human relatives found?
Define the following terms
Uniformitarianism
&
trace fossil
Answer:
Uniformitarianism- A theory that geologic process that occur today are similar to those that have occurred in the past
Trace Fossil- A fossil of a foot or trail or other travel of an animal rather than of the animal itself
PLS HELP ME IT IS SUPPOSED TO BE DONE IN 10 MINS PLS In a two paragraph (it can be a 2 sentence paragraph) extended response, summarize the ways in which technological advances and enforcement of safety and environmental laws and regulations are attempting to avoid or reduce the negative effects of finding, producing, and transporting oil.
Answer:
Environment: They must be supplied and used in ways that have minimal safety and environmental stewardship have advanced safety regulations and practices, promulgated rules for reducing VOC emissions from oil and gas production and ... disposal protocols are similarly reducing negative impacts to air and water.
Explanation:
What happens to salt water and fresh water when you try to mix them.
Answer:
the lighter fresh water rises up and over the salt water
Explanation:
this is because the salt water is denser
Answer:
When trying to mix fresh/salt water it leads to variable and dynamic chemical conditions, especially salinity because fresh water flowing into the estuary is less salty and less dense than water from the ocean, it often floats on top of the heavier seawater.
Explanation:
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A disease caused by the inflammation of mucus membranes inside the bronchial tubes. There are more than 3 million U.S. cases a year.
Inflammation can have causes that aren't due to underlying disease. Examples include injuries such as sprains and strains, overuse, or insect bites.
A science class performed an investigation to model heat absorption with sand and water. The class put a beaker of sand and beaker of water under a heat lamp. The data to the left were the results after 10 minutes of heating. Using the information in the data table to the left, is the data the class collected valid?
Answer:
mkhcxfjvuh jb
Explanation:
,bnb kj
hope this helps
Describe the concentration of hydronium ions and hydroxide ions when a base is added slowly to a white vinegar solution. The pH of white vinegar is 3.1.
Answer: as you add the base it added some PH. The Ph lever of white vinager is2.4 - 3.4
How does resource extraction affect local and national economies?
Answer:
The direct channels by which extraction can affect the economy are of particular interest. The development of mines or oil and gas fields can result in significant shocks to a regional economy, generating jobs and drawing in capital from other regions and countries.
Explanation:
What type of worm has a circulatory system?
Nematodes
Segmented worms
Roundworms
Flatworms
Your answer will be Segmented worms. Segmented worms have a closed circulatory system in which blood is enclosed in blood vessels.
some students observe four different lab investigations. The students record their observations in a table.
Investigation
Observations
1
A beaker of water is
heated on a hot plate. Bubbles form in
the water, and steam is given off.
2
Oil is added to a beaker of water. Oil forms a layer on top
of the water
3
Sand and iron filings are mixed in a beaker. A magnet is
then used to separate the iron filings from the sand.
4
A piece of chalk is placed in a beaker of vinegar Bubbles
form as a gas is given off.
Which investigation most likely involved a chemical reaction?
Answer:
Number 4 is an example of a chemical reaction
Explanation:
heThe chalk is reacting with the vingear which is creating a new substance. The new substance is the gas that the reaction gives off.
√225/√25 = ?? hurry please I'm stuck on it
Answer:
√225/√25 =3
The answer is 3
Explanation:
Answer:
The answer is 3
Explanation:
Mr. Rogers wanted to study the affect of different types of music would have on students ability to complete the IA. What is his dependent variable? What Is his independent variable ?
A. classrooms
B. types of music
C. IA scores
D. students
