DO NOW. energy? what you think we are going to learn about.

Transcription

1 DO NOW 1. What are the steps to make a sedimentary rock? 2. Compare and contrast a renewable and nonrenewable resource? 3. What are some ways that we can conserve energy? 4. Write me a story about the following pictures and what you think we are going to learn about.

2 Why do all these things happen?

3 Density l Density: the amount of matter per unit of space of an object But what does that really mean? How compact or packed together the matter is in the space of an object.

4 Which is more dense Coke or Diet Coke? (think: Which will sink?) l Write your hypothesis. l Watch! l Write your observation which one sunk? l Think, Pair, Share why did that one sink?

5 What makes Coke different from diet Coke? More sugar Less sugar

6 What is different between the two cans? l Coke: l 355 ml l 39 g Sugar l Total mass 394 g l Diet Coke l 355 ml l 0 g Sugar l Total mass 355 g

7 So what can we conclude about density? More dense = sink Less dense = float

8 Formula of Density: l Density: the amount of matter per unit of space of an object Matter: per: Space: Mass Volume

9 Formula for Density D = m = mass = g_ V volume ml (cm 3 )

10 Formula for Density: Let s try one Mass= 4 g Volume= 2 ml D = m = mass = g_ V volume ml (cm3 )

11 Try a few more on your own: 1. M= 10 g V= 2 cm3 Density=? 2. M= 15 g V= 3 ml Density=? 3. M= 35 g V= 5 cm3 Density=? 4. M= 60 g V= 10 cm3 Density=? 5. M= 8 g V= 2 ml Density=? Which one of your answers is most dense? Which one of your answers is least dense?

12 Density Sink or Swim lab!

13 Exit Ticket

14 DO NOW 1. Explain what density is? 2. What direction do denser things move in (up or down)? 3. What is the formula for density? 4. What are the units for density? 5. If an object has a mass of 4 g and a volume of 2 ml, what is your density? 6. M=156 g and V= 8 ml, Density=

15 BrainPop! randchemistry/statesofmatter/

16 States of Matter and density Draw this chart quickly in your notebook!! For notes today Structure Molecule Movement Comparative Density Temperature

17 States of Matter and density Draw this chart quickly in your notebook!! For notes today Structure Rigid, fixed (not changing) Flowing, moving, taking shape of container Free moving, expanding unless in container Molecule Movement Molecules vibrate but don t change shape Molecules slide or flow past each other Fast moving molecules that spread out Comparative Density Temperature

18 Compare the two forms of matter: Which of these has more matter? Which has more space? So which one is the most dense? Object 1 Object 2

19 Density Beads Lab

20 Exit Ticket

21 DO NOW 1. What did a bead represent in the lab yesterday? 2. How do molecules of a solid move? 3. How dense is a liquid compared to solid and gas? 4. Are molecules of a gas close or spread out? 5. What shape do gases and liquids take? 6. Why are solids considered the most dense?

22 Are you smarter than a 6 th grader? ANSWER THE QUESTIONS & FIND THE PATTERN first 3 get shine! 1.When you are going to use the microwave you say you are going to heat your food. 2.When you are playing NBA Jam video game and make several baskets in a row they say you are up. 3.When you are really hot after running around outside in the summer you go inside to down. 4.When you blow on your food if it is too hot you are trying to cool it.

23 Density & Temperature: Water Demo l Hypothesis: What do you think will happen if I cold water and hot water--does the density of water change? l What did you observe? l Think, Pair, Share why did this happen? l Extension: What would happen if you let this sit for a while and the cool water warmed up and the hot water cooled down?

24 Real life application: l /temperature/ (watch from 1:45-2:11) Think, Pair, Share: Explain why hot air rises and cold air sinks using the concept of density?

25 Temperature changes density! l Increased temperature causes molecules to move faster and expand increasing volume and decreasing density causing it to rise. move faster expand volume density

26 Temperature changes density! l Decreased temperature causes molecules to slow down and get more compact decreasing volume increasing density causing it to sink. D move slower condense volume density

27 Show me what you would do Based on the color of your card: tell me everything you know (what temperature, what do the molecules do/how do they move, where does it travel and why) write it on your card! and then show me: If you go up sit on your desk with arms spread out. If you go down sit on the floor in a tiny ball. SWITCH!

28 Real World application: l Are attics hot or cold? l Are basements hot or cold? l Why think about density, temperature and sinking/rising?

29 Challenge Question: l Two balloons are filled with equal volume of air. One is put in the refrigerator for one hour, while the other is heated in a slightly warm oven. Identify which balloon is which and explain what happened in terms of volume and density.

30 Exit Ticket