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WorksheetsChuyên đề 4: Matter
Total questions: 16
Worksheet time: 8mins
The smallest unit of a matter is a(n)
molecule
atom
neutron
electron
Which are characteristics of all metals?
They are malleable, ductile, and conduct electricity
They are malleable, inert, and conduct electricity
They are malleable, ductile, and form ionic bonds
They are noble, ductile, and form ionic bonds
Which of these is NOT a characteristic of glass?
Transparent
All acid resistant
Non-flammable
Fragile
Water, ice, and steam are alike because they -
are the same compound
have the same shape
look the same
feel the same
What will happen if the lid is removed from a container that holds helium gas?
The gas will expand and escape from the
container.
The gas will slowly change back into a liquid.
When light hits the gas, it will change colors.
Gravity will keep the gas in the container.
When ice cream is left out of a freezer, the ice cream changes from a —
solid to a gas
gas to a liquid
solid to a liquid
liquid to a gas
When a liquid changes into a solid it is
freezing
evaporating
sublimating
conducting
In a _____ state, matter has a definite volume and is not easily compressible.
liquid
gas
atom
solid
What happens to atoms after a chemical change?
They remain in the same place
They become bigger
They link up in different ways
They dissolve to form a mixture
A physical change can sometimes result in a color change. Which of the following situations show this?
Milk turns yellow when it spoils
Dough becomes darker when it is baked into cake
A red candy dissolves and turns water pink
A match turns black when it is burned
A pH change can be evidence that
A substance has changed physically
A substance's state of matter has changed
No change has taken place
A substance has changed chemically
On a camping trip, Marta roasts a marshmallow in the campfire. The marshmallow grows, and then turns black. Marta notices that the roasted marshmallow smells and tastes differently than the uncooked marshmallows. What change has taken place, and how does Marta know?
a chemical change because the marshmallow changed in taste, color and smell
no change because the marshmallow is not a new substance
only a physical change because the marshmallow changed size
a chemical change because the marshmallow only changed in pH
Which types of matter are pure substances?
homogenous mixtures and elements
solutions and compounds
elements and compounds
mixtures and elements
To form brass, copper and zinc combine but do not chemically bond. Brass is a(n)
atom
element
compound
mixture
Beryllium appears on the periodic table with the symbol Be. It may bond with sulfur to form the compound BeS. Beryllium is a(n)
element
compound
heterogeneous mixture
solution
In the lab, Gregory is using a substance that has the same composition throughout. He separates the substance into a liquid and solid using a physical process. Based on this description, Gregory's substance is a(n)
element
compound
heterogeneous mixture
solution
