WorksheetsUnit 9 - Ch 9 CKLA (8 pts)
Total questions: 10
Worksheet time: 30mins
Name
Class
Date
1.
What tools did Amy and Matt learn to use at the dig site to excavate fossils?
a)
A computer
b)
A rock hammer and chisel
c)
A telescope
d)
A microscope
2.
What happens when plaster of Paris is mixed with water?
a)
It undergoes a chemical change
b)
It explodes
c)
It dissolves completely
d)
It turns invisible
3.
Why are chemical changes considered the ultimate recyclers?
a)
They use sunlight directly
b)
They recombine elements in new ways
c)
They only occur in laboratories
d)
They create new elements
4.
What is photosynthesis?
a)
A type of fossil
b)
A chemical change using sunlight to create sugar and oxygen
c)
A method to break down plastics
d)
A process to create water from air
5.
What item did Tess use to explain the concept of how chemical changes are responsible for recycling elements?
a)
A plastic water bottle
b)
A leaf
c)
A piece of coal
d)
A dinosaur bone
6.
What did Dr. Forrester discover?
a)
A new species of plant
b)
A mineral
c)
A new species of dinosaur
d)
An ancient tool
7.
What unique feature helped identify the dinosaur bones?
a)
Color of the bones
b)
Size of the bones
c)
Muscle attachment ridges
d)
Weight of the bones
8.
What does the discovery of a new dinosaur species imply for the students?
a)
A trip to another dig site
b)
Their names on a scientific paper
c)
Extra homework
d)
A television interview
9.
Why are dinosaur fossils important to scientists?
a)
They can be sold for a lot of money.
b)
They help scientists understand what Earth was like in the past.
c)
They prove that humans and dinosaurs lived at the same time.
d)
They are used to make jewelry.
10.
When a chemical change occurs...
a)
carbon dioxide is always released.
b)
elements rearrange and a new substance is created.
c)
elements rearrange and the substance stays the same.
d)
the substance changes its physical form.
100 %
