Answer:
20g of water would freeze at the Same temperature
Please help me with this question
Answer:
B
Explanation:
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
Answer:
It is B. physical.
Explanation:
The rust on the pipe is something causes by something, which mean it is physical. Hope this helped you out!!
Have a wonderful day! :D
What is the charge for a nitrogen ion?
A) 3-
B) 1-
C) 2-
D) 2+
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?
Answer:
Na+ ion is smaller than a neutral Na atom in the ion there was one more proton which will attract electron bring it closer to the center making the atomic radius smaller. Therefore making a Na+ ion is smaller than a neutral Na atom Explanation:
yes
HELP PLEASEEE
How do we know what is inside the Earth? (How do we know the Earth has layers?)
(if you put a random answer for the points i will report)
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
Answer:
yeah it is
Explanation:
what rhe ebenja
Answer please 10 points
Answer:
water
Explanation:
Answer:
Water
Explanation:
Most of the Earth is covered with water, so water is the substance.(H20)
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.
I think it's A
Explanation:
I don't really got an explanation i just have the feeling
____CaSO 4 , ____O2 +____CaS
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!! DUE TOMORROW 40 POINTS!!!!!!!!!!!!!!!!!!
Elements in the same period are similar in that
same number of valence electrons of same number of energy shells
Answer: I believe this is the answer: The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Good luck on assignment! :)
Answer: The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. Every element in the first column (group one) has one electron in its outer shell.
Explanation: :)
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 pictures show a large star statute when it was placed in front of the observatory, and the star five years later.
image
What best explains happened to the star statue?
A. weathering by low temperatures
B. erosion by high temperatures
C. weathering by wind and rain
D. erosion by wind and rain
(SORRY THE IMAGE DIDNT LOAD)
Answer:
kjklllllllllllllllllll
Explanation:
jl m
Summarize the Natural Processes of weathering ,erosion, and deposition
Answer:
I won’t do it in paragraph form cuz it will look very choppy but here you go:
Weathering is when the weather itself changes something, like when a metal bike gets rusty after sitting outside for a long time, or when a plant grows out of concrete.
Erosion is when something gets eroded away at. Like when something has water or wind is flowing against it so much that it changes shape. This is how canyons are made.
Deposition is when a gas turns into a solid, removing energy and skipping the liquid step (frost forming on car window)
\Which type of graph would best represent data from this experiment: Which sport is most popular? Question 2 options:
A. Bar graph
B. Circle graph
C. Line graph
Answer:
bar graph and line graph
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
the atomic number of an element is the number of ______ plus the number of _____ found in the element's nucleus.
Answer:
protons and electrons
Explanation:
The symbol for an atom can be written to show its mass number at the top, and its atomic number at the bottom. To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number.
When an apple falls from a tree, when does gravity act on the apple?
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?
Answer:
the answer is the earths crust because those are the icons surrounded each sulfide.
Explanation:
hope this helps!!! i love science/cemistry
at least two examples
of Chemical Formula
Explanation:
Rotting, withering, heat and light emission, precipitate formation, gas evolution, or a change of appearance.
Answer:
h20 (water duh)
C9H13N (Amphetamine)
C6h1206 (glucose)
I need help with the question in the photo!!
Answer:
a semi-crystalline structure is formed, which holds the water molecules apart, making ice less dense than liquid water, such that it floats. This means that it insulates the water beneath, allowing organisms in the liquid water to survive. Cohesion is the tendency of molecules within a substance to ‘ stick together
explanation:
Which of these is not considered a pure substance?
An atom
A mixture
An element
A compound
Answer:
A mixture is not a pure substance.
Definition: Water that falls to the ground as rain
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.
Answer:
Specifically, Earth rotates faster at the Equator than it does at the poles. Earth is wider at the Equator, so to make a rotation in one 24-hour period, equatorial regions race nearly 1,600 kilometers (1,000 miles) per hour. Near the poles, Earth rotates at a sluggish 0.00008 kilometers (0.00005 miles) per hour.
PLEASE HELP ME ITS DUE IN 1 HOUR PLZZZ
the atomic number of an element is the number of ______ or ______ contained in the element.
Answer:
electrons or protons
Explanation:
This statement only applies to neutral atoms where the number of protons and electrons is equal
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
Answer:
C
Explanation: The dust bowl killed many crops resulting to low nutrients
Is there a relationship between cohesion and volume?
Where does energy for all living things come from FIRST
Answer:
The Sun is the major source of energy for organisms and the ecosystems.
Explanation:
In a __________________ reaction, elements are not changed, just rearranged. Small amounts of energy take place.
a. Endothermic
b. Exothermic
c. Nuclear
d. Chemical
Help! Quicklyyyy! Easy science thing.
Answer:
A year too late..
Explanation: