8th Grade Science: Question Preview (ID: 31024)

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John is making a pizza. Which process involves a chemical reaction?
a) mixing spices for the sauce
b) baking the dough to form the crust
c) slicing pepperoni for topping
d) spreading cheese on the pizza

Which of these must occur when a substance goes through a chemical change?
a) The substance changes shape.
b) The substance changes phases
c) The substance forms a new substance
d) The substance gets larger.

2 or more substances combine together and keep thier individual properties is called a
a) atom
b) compound
c) element
d) mixture

2 or more elements that have been chemically combined is called a
a) element
b) mixture
c) atom
d) compound

What state of matter has no definite shape, but a definite volume?
a) Solid
b) Liquid
c) Gas

What state of matter has particles that have no definite shape or volume?
a) Solid
b) Liquid
c) Gas
d) Water

Which one is a compound?
a) Carbon
b) Water
c) Oxygen
d) Hydrogen

What element shares similar chemical properties to that of Calcium?
a) Potassium
b) Barium
c) Hydrogen
d) Carbon

Which one is a compound?
a) He
b) H
c) HCl
d) Ca

What state of matter moves the slowest
a) plasma
b) gas
c) liquid
d) solid

Where are metals found at on the periodic table?
a) right
b) left
c) botton
d) stair case

H + Cl yields HCL. What's the reactants?
a) HCl
b) H + Cl
c) Cl
d) H

What family/group on the perodic table is least reactive
a) Noble Gases
b) Alkali Metals
c) Transition Metals
d) Alkaline Earth Metals

What is an example of a chemical change?
a) Breaking glass
b) Ice cube
c) Rusting nail
d) Cutting paper

The most abundant element in the Earth's atmosphere is:
a) Oxygen
b) Hydrogen
c) Carbon Dioxide
d) Nitrogen

What is the density of a 10 g object with a volume of 2 ml?
a) 12 g/ml
b) 8 g/ml
c) 20 g/ml
d) 5 g/ml

2H + 2O yield 2HO. Whats the product?
a) 2H
b) 2O
c) 2HO
d) 2H + 2O

What state of matter has particles that are far apart and move fast?
a) solid
b) liquid
c) gas

What basic units of matter that has the same properties as an element called?
a) electrons
b) neutrons
c) atom
d) protons

What is an example of a mixture?
a) Water
b) Air
c) Oxygen
d) Table salt

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