science overview slides
TRANSCRIPT
Review:
• Matter: Anything that has volume and takes up space
• Mass: The amount of matter in an object
• Volume: The amount of space an objects takes up
Density
• Property of matter that describes the relationship between its mass and volume
• Describes how closely packed its atoms are
The density of water is 1 g/mL
Matter with a higher density will _____.
Matter with a lower density will _____.
An object has a mass of 12 g and a volume of 4 mL, what is it’s density?
Will it sink or float in water?
Example:
An object has a mass of 3 g and a volume of 4 mL, what is it’s density?
Will it sink or float in water?
Example:
Problems?
• How many ounces in a gallon? 128
How many inches in a mile? 63360
How many ounces in a pound? 16
Celsius (˚C)
*Measures temperature
* freezing water 0˚C
* boiling water 100˚C
* body temp 37˚C
Metric Base Units
Metric PrefixesBase Units
meter (m)
liter (L)
gram (g)
deci
(d)
centi
(c)
milli
(m)
deka
(da)
hecto
(h)
kilo
(k)
increasing decreasing
1000 100 10 .1 .01 .0011
Problems? Not at all…
How many cm in a meter? 100
How many mL in a L? 1000
5 kg is how many grams? 5000
1. In the lab, you are going to be working with an open flame. Describe two safety precautions you should follow to complete the lab safely.
2. Describe one thing that the students are doing incorrectly in this picture.
3. Your lab partner drops a beaker which shatters on the lab surface. Describe two safety rules that should be followed in this situation.
4. During a lab, you use hydrochloric acid. What should you do with the acid after the lab is complete?
5. During the lab with hydrochloric acid, your lab partner gets some of the acid on her fingers. What precautions should be taken so that her skin doesn’t burn?
6. A classmate offers you some water from a beaker being used in an experiment. How will you handle this situation?
7. What should a student do if they get something in their eye?
8. A student has long hair. You will be doing a lab using a Bunsen burner. What should that person do before starting the lab?
9. A lab has many powdered chemicals that are used to complete it. What should you do before leaving the room for your next class?
10. When using electrical equipment in a lab, describe two safety precautions that should be followed.
11. A student’s clothing starts on fire. What should you do?
12.Before starting any lab procedure, you should always_________________________________.
15. What safety procedure is not being followed in this picture?
16. Why is this situation life threatening?
19. You are about to start a lab when you notice the test tube has a crack in it. What should you do?
20. When you and your lab partner finish a lab, what is your responsibility before you leave the classroom?
21.What is the procedure in the picture called?
22.Why is it important to use this procedure in a lab setting?
BONUS!
Steps of Scientific Method
• 1. Ask a Question/Problem– Ex: What is the ideal amount of water for optimum
grass growth?
Steps of Scientific Method
• 2. Research and Collect Information– Find out as much information
• Ex: Ask a nursery owner, landscaper, internet, books, etc.
Steps of Scientific Method
• 3. Form a hypothesis (IF, THEN, BECAUSE)– Ex: If grass gets 20 minutes of watering each day, then
it will grow the most because water is necessary for cell growth.
Steps of Scientific Method
• 4. Test the Hypothesis by Experimenting and Collecting Data– Ex: What would the experiment look like?
What type of data would you collect?
Steps of Scientific Method
• 6. Draw a Conclusion – Answer the original question
– Give a reason for your conclusion
– Include data (numbers!) to back up your answer
Hypothesis
• An educated guess or testable statement– Ex: Irish people are smarter than other
people.
Observation
• Gathering information using the senses and/or equipment– Senses:
• Sight
• Touch
• Taste
• Sound
• Smell
Prediction
• Use of knowledge to identify and explain observations or changes in advance– I predict the Vikings will beat the Lions
Law
• A descriptive generalization about how some aspect of the natural world behaves under stated circumstances– Ex: Newton’s Laws of Motion