NAT SCI 1 FINAL EXAM

1. Identify the apparatus shown in the image. answer in lower case letters

2. Which statement best describes an element?

• a pure substance made up of only one kind of atom

• any combination of two or more atoms of different types

• a substance containing only carbon atoms

• any kind of crystal

3. The smallest unit of matter that retains the properties of that matter is ________________

• a molecule

• a compound

• an atom

• a mixture

4. The horizontal rows of the periodic table are called

• Periods

• columns

• groups

• families

5. Which of these recorded observations is qualitative, rather than quantitative?

• A chemical reaction is complete in 2.3 secs.

• The solid has a mass of 23.4 g

• The compound melts at 87.5 degrees centigrade

• Iron is denser than aluminum.

6. The SI base units for time and temperature are ...

• hour and degree Celsius

• second and degree Celsius

• hour and kelvin

• second and kelvin.

7. Choose the name and use of the apparatus shown in the image.

• weighing balance, used to measure mass of small quantities of materials

• beam balance, used to measure small mass of materials

• electric balance, used to measure large mass of materials

• electronic balance, used to measure small mass of materials

8. Select which best describes the image shown.

• siphon, used to transfer liquid from a large container to a smaller one.

• funnel, used to cover a beaker containing volatile chemical

• siphon, used to transfer liquid or fine grain materials into a container of very small opening

• funnel, used to transfer liquid or fine grain materials into a container of very small opening

9. Which best describes the apparatus shown?

• googles, protects the eyes from harmful chemicals and splinter materials

• face shield, guards the face from splinters in welding works

• eye cover protector, protects the eyes from harmful smoke

• goggles, protects the eyes from harmful fumes and corrosive chemical spatters

10. Used to prepare solutions to an accurate volume. (ANSWER IN LOWER CASE)