Science question! Please read the article and give 2 new facts (not about continental drift please)! Please do this and you get 20 points!

Answer:

1. Scientists can determine the age of the seafloor through rock samples.

2. An isochron is an imaginary line on a map that shows points that have the same age.

Explanation:

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?

Given the following equation: Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

If you start with 4.50 grams of Magnesium (Mg), how many grams of Hydrogen gas (H2) will you theoretically produce? If you actually produce 0.25 grams, what is your percent yield?

please help

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

Water freezes at 32 degrees

Group of answer choices

Fahrenheit

Celsuis

Kelvin

Tell me why in Louisiana it always gotta freaking have a hurricane

The distance time graphs for two objects are shown below: look at the picture. Which statement is true? Both objects move at variable speeds. Both objects move at a constant speed. Object A is moving at constant speed but Object B is moving at variable speed. Object A is moving at variable speed but Object B is moving at constant speed.

Can you get this done before 10:40 pls

Help plz :<

In a combustion reaction, carbon is used to make reactants burn.


Please select the best answer from the choices provided

T
F

A disease caused by the inflammation of mucus membranes inside the bronchial tubes. There are more than 3 million U.S. cases a year.

Help me with an easy question worth 25 points

What makes a material dense if we are calculating the Speed of light in thousand miles per second.

Pls help due in 5 minutes
When does the Southern Hemisphere experience the shortest day (and longest night) of the year? Why?

Solar: converts mechanical energy of _____________ into electricity.
Wind
The Sun
Water

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.

Which of the following is NOT a way of making heat?
A. turning on an electric light
B. eating a sandwich
C. rubbing sticks together
D. melting an ice cube

The neighborhood swimming pool is 20 feet long, 8 feet wide, and 4 feet deep. Which formula below should be used to find how much water the pool can hold?

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

What type of worm has a circulatory system?
Nematodes
Segmented worms
Roundworms
Flatworms

What happens to salt water and fresh water when you try to mix them.

Which of the following occurs when there is a chemical reaction? (Mark all that apply.)
a. the reactants don't change
b. bonds between atoms break
c. atoms rearrange
d. new bonds form
e. new substances form
f. there is no product

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?

Help please! Its due in a few minutes!!

√225/√25 = ?? hurry please I'm stuck on it​

What drives the movement of Earth's tectonic plates?
A the movement of air currents pushing on the plates
OB. the convection of magma under the plates pulling them
Cthe movement of Earth on its axis pulling on the plates
Dthe convection of ocean currents above the plates pushing them

Elijah's car broke down. It takes 1400 Newtons
of force for the tow
-truck to pull his car. If
Elijah lives 800 meters away, how much work
will it take to tow his car home? If it takes him
40 minutes to get home, what is his average
speed? Force Distance Time Work Average
Speed

How does resource extraction affect local and national economies?

A scientist designs some experiments to record how various substances change. She then reviewed her results. Which of the investigations listed below is an example of how the substance changed chemically?


Sodium metal reacts violently and explodes with water.


After heating aluminum in a crucible, it began melting at 1200 degrees F


Hydrochloric acid is stored inside plastic containers.


Grinding Copper sulfate allowed it to be dissolved much quicker.

Explain how you could use the solubility of a substance to make a saturated solution.

Make a claim about whether or not a piece of pottery is an example of a fossil? Summarize evidence to support your claim and explain your reasoning.

how many joules would it take to raise 2 grams of AL 1 degree?

If you start with 5.5 liters of hydrogen peroxide (H2O2), how many molecules of oxygen gas (O2) will be produced?

Frozen ice caps in the Arctic Ocean are composed of?
A water vapor
B salt water
C fresh water
D a mixture of salt and fresh water