Can someone please help me quick!!!
A student compared some soccer players to the atoms in the liquid state. Which of the following activities were the soccer players most likely performing?
A-Lining up next to each other
B-Huddling around each other for the ball
C-Running randomly in all directions
D-Slowly jumping up and down in their places
Two states of matter are described below.
State A: Cannot be compressed and retains its shape
State B: Highly compressible
Which combination of the state and a substance in that state is correct?
A- State A = air; State B = neon
B-State A = water; State B = number cube
C-State A = water; State B = oxygen
D-State A = piece of metal; State B = air
If a chemical change has taken place, which of these is most likely true?
A-Original substance can be easily recovered.
B-Composition of a substance is the same.
C-A completely new substance is formed.
D-An easily reversible process has taken place.
Over a period of time a student observed a small tadpole changing into a frog. Which of the following explains the physical change that takes place in this growing frog?
A-The frog can change back into a tadpole.
B-The tadpole changes its shape and form.
C-The frog is made up of a different set of elements than the tadpole.
D-Many reactions take place inside the tadpole as it changes into a frog.
Which of these is an example of recombination of atoms to form newer molecules?
A-Molding a wire of gold
B-Hammering a piece of iron
C-Tarnishing of a silver coin
D-Rolling of a sheet of aluminum
Which process changes substances into new substances with new properties?
A-Chemical Change
B-Compressibility
C-Malleability
D-Physical Change
Judy kept 250 grams of juice in the freezer. What is most likely the mass of the frozen juice formed and why?
A-250 g, mass remains same during physical change of freezing
B-500 g, mass of ice is twice the mass of juice
C-250 g, mass is conserved when matter is destroyed to form ice
D-200 g, mass of frozen liquid is less than mass of the original liquid
Anna heated 15 g of Substance A to obtain 5 g of Substance B, 4 g of Substance C, and a certain amount of Substance D. Which statement is correct?
A-The mass of Substance D was 10 g less than the mass of Substance A.
B-The mass of Substance D was 1 g greater than the mass of Substance B.
C-The mass of Substance A was equal to the total mass of Substance C and Substance D.
D-The mass of Substance A was equal to the total mass of Substance B and Substance D.