10.  Who is responsible for cleaning your lab equipment and station?

You are responsible for keeping your lab equipment and area clean. You need to pick up everything and dispose of it in the correct locations.

11.  How do you smell something in the lab?  Give the word and a brief description.

When smelling something in the lab you should never do it, only if you are instructed to do so. If you need to smell it, then you gently wave your hand to spread the fumes into your nose.

12.  What type of shoes should be worn in the lab?

Closed toed shoes are to be worn in the lab

13.  What should you do if you don’t understand the lab instructions?

If you do not understand lab instructions you should ask the lab supervisor or your teacher for help on what to do.

PART 2:  THE NATURE OF SCIENCE

Write the step of the scientific method next to each description.

14.  The question being tested or what you are trying to discover in your experiment.  Hypothesis

15.  A list of supplies and equipment needed to conduct the experiment. Materials

16.  The final summary of the data and results reached by experimenting.  Conclusion

17.  A testable statement about what is going to happen in an experiment. Written in the following format:  If…, then…  hypothesis

18.  A detailed step-by-step description of how to conduct the equipment.  Procedure

19.  Detailed observations about what happened in the experiment including graphs, charts, and tables.  Observations and Inferences

20. The gathering of information by using our senses is called making observations.

21.  An explanation or interpretation for an observation you have made is called an Inference.

22. Inferences are based on data or prior observations.

23. The independent variable is the variable that the experimenter purposely changes.  It is also known as the testing variable.

24. The dependent variable is what is being measured.  It is also called the outcome variable.

25. The controlled variables are any variable that the experimenter keeps the same so it does not affect the outcome of the experiment.

Identify the following observations as quantitative or qualitative

26. Quantitative  The boy has 2 dogs

27. Qualitative   The girl is wearing a skirt.

Identify the following as observations or inferences.

28. Observation   I see a blue bird

29. Inferences  The cat is meowing so he must be angry

PART 3:  MATTER & ATOMS

30. Anything that has mass and takes up space is called?

Matter

31.  A pure substance that cannot be broken down chemically is an?

Element

32. Two or more elements that are combined chemically are called?

Compound Substance

33. Two or more elements that are together but not chemically combined are called?

Mixture

34. If you change the number of protons in an atom it makes?

It changes the atomic mass

35. What is an isotope?

An atom with the same number of protons but different number of neutrons.

36. An atom that has the same number of protons and electrons has a neutral charge.

37. An atom that has a charge because it has gained or lost electrons is?

Ion

38. A positive ion has more?

Protons than electrons

39. Label the following mixtures as homogeneous or heterogeneous:

heterogenous     homogenous

40. Label the parts of the atom (1-4).  Include charges on the subatomic particles.

1. Protons

2. Neutrons

3. Electrons

4. Nucleus

41.  Label the arrows below as (atomic mass, atomic number, element symbol, element name):

1. Atomic number

2. Element symbol

3. Element name

4. Atomic mass

42. How many protons does oxygen have?

8

43. How many electrons does oxygen have?

8

PART 4:  MATTER PROPERTIES & CHANGES

44. The amount of matter in an object is its?

Mass

45. The gravitational pull on an object is called?

Weight

46. The amount of space an object takes up is called?

Volume

Label the following as P physical change or C chemical change.

47. C Burning wood

48. C  a cake

49. P Cutting a piece of paper

50. P  turning to water

Describe the following pictures as solids, liquids, or gasses.  Indicate which of each has a definite volume or a definite shape.

A.             B.        C.   

Short Answer:

How are mass and weight different?

Mass is the amount of matter an object has and weight is the gravitational pull on an object.

Describe two signs that indicate a chemical change has occurred?

1. It’s changed permanently

2. You can't change it back