In a ___________ reaction, an acid and a base produce a salt and a water.
a. Decomposition
b. Neutralization
c. Synthesis
d. Concentrated

When an earthquake occurs, two different types of waves are generated. These waves are called P waves and S waves. Examine the diagram, which shows how the waves travel through Earth. Which statement provides the best evidence of Earth’s structure, based on the information in the diagram?








A. The bending of S-waves shows that Earth has both an outer and an inner core.

B. Earthquakes provide no information because they cannot be detected all over Earth.

C. S-waves do not travel through liquids, so the evidence shows that Earth has an outer core layer made of liquid.

D. P-waves do not travel through liquids, so the evidence shows that Earth has an outer core layer made of liquid.

When an apple falls from a tree, when does gravity act on the apple?

In a __________________ reaction, elements are not changed, just rearranged. Small amounts of energy take place.
a. Endothermic
b. Exothermic
c. Nuclear
d. Chemical

PLEASE HELP ME ITS DUE IN 1 HOUR PLZZZ

Why does the Earth spin faster at the equator than the poles?

a
Due to the temperature differences on Earth, the land/sea near the equator goes at a faster rate. The Earth spins faster there only during the summer months.
b
The Earth is much wider at the equator than at the poles. It must cover a larger distance in the same amount of time (24 hours).
c
Due to the tilt of the Earth on its axis, the equator gets more sunlight -- therefore making it spin faster.

Please helpp!!!!!!!!
If the pattern of ions shown here for galena is expanded in every direction, how many sulfide ions would surround each lead ion? How many lead ions would surround each sulfide ion?

Is there a relationship between cohesion and volume?

Why do you think the Na+ ion is smaller than a neutral Na atom? Why do you think the Cl - ion is larger than a neutral Cl atom?

Please help me with this question

Definition: Water that falls to the ground as rain

Answer please 10 points science queasy

Which two factors that influence weather are caused by the uneven heating of
Earth's surface by sunlight?
A. The formation of ocean currents that carry cold or warm water
B. The curving of an ocean current's path as Earth rotates
C. The formation of convection currents in the atmosphere
D. The curving of an air current's path as Earth rotates

Help! Quicklyyyy! Easy science thing.

Explain the “war of the currents”
please help with at least 1 sentence

at least two examples
of Chemical Formula

Answer please 10 points

How should Point 2 on the Land Breeze diagram be labeled?
a
Cool air, high pressure
b
Cool air, low pressure
c
Warm air, high pressure
d
Warm air, low pressure

The Dust Bowl was a time In the 1930s when prairie states in the Midwest had farmlands torn apart by wind erosion and storms. This disaster caused food shortages and financial hardship. What practice is most helpful to prevent another similar tragedy?

A. no-till farming to allow roots to hold soil together
B. over watering of fields to keep soil wet
C. terrace farming by putting walls up on hills
D. agricultural reform to change the types of crops planted

Beginning
1
Nutrients are absorbed by blood in tiny blood vessels.
2
Mechanical digestions using teeth, and chemical digestion using saliva.
3
#
Mechanical digestion using organ walls, and chemical digestion using acids.
4
Water is removed from unused food, which is then compressed.
End

After learning about chemical reactions, Jack investigated different kinds of chemical changes using substances he found in his kitchen so that he could see these changes. Which of the following will NOT occur when a chemical reaction takes place?

A.New bonds form.
B.Existing bonds break.
C.The same substance will have different properties.

Help me with this please! Do not say "I don't know" to get my points!!!!!!! It is not helpful and disrespectful. THANKS!

Which of the following 4 elements would be the most stable?
A) Neon
B) Chlorine
C) Hydrogen
D) Fluorine

Where does energy for all living things come from FIRST

can you please help. I don't know how to do it.

Melvin is exploring the different kinds of changes that can happen to substances. After reading about the kinds of changes that occur, he saw some rust on a pipe that was going into his house. What kind of change is the formation of rust?

A.reactant
B.physical
C.chemical

What reaction type is MgCl2 ---> Mg + Cl2 ?
a. Synthesis
b. Single Replacement
c. Double Replacement
d. Decomposition

The Brahman cattle have good resistance to high temperature, but its meat is poor and tough to eat. The English shorthorn cattle, on the other hand, have good meat, but poor resistance to high temperatures. Farmers formed the Santa Gertrudis cattle by breeding Brahmans with English shorthorns. This new type of cattle has good meat and resistance to high temperatures. Which of the following best describes the process used to produce the Santa Gertrudis cattle?

A.
genetic engineering

B.
inbreeding

C.
natural selection

D.
selective breeding

____CaSO 4 , ____O2 +____CaS

the atomic number of an element is the number of ______ plus the number of _____ found in the element's nucleus.

This mountain top is covered with trees. A forestry company wants to remove the trees for lumber.

Which will most likely happen to the rocks on the mountain if the trees are removed?
A. Wind and rain will begin to erode the rocks and the mountain will flatten over time. B. New trees will grow back very quickly and the mountain rocks will not be changed. C. The mountain will quickly become much smaller without the protection of the trees.
D. The mountain will grow as additional sedimentary rocks are formed.