Practice WS for Objective #1 - KEY

Full text

(1)Practice WS for Objective #1 - KEY Directions: What do the following letters stand for? Try to do this without using notes or other resources. Once you are finished, check your answers with the Key on the class portal. If you got most of them right, you may be ready for this section of the test. C = Consistent O = Observable N = Natural P = Predictable T = Testable T = Tentative What do we use these words for? These words are guidelines that allow us to determine if something is science or nonscience. They must fit all the guidelines to be science.. Which of the following is a scientific statement, and which one is not a scientific statement? 1. Green plants will grow towards a light source. Science 2. Walking under a ladder will cause bad luck. Non Science Which of the following is a scientific statement, and which one is not a scientific statement? 1. Some plants eat meat. Science 2. Extraterrestrial beings have visited Earth Non Science Which of the following is a scientific statement, and which one is not a scientific statement? 1. The Bermuda Triangle causes ships and planes to sink and disappear. Non Science 2. Life comes from life and cannot come from non-life. Science. Practice WS for Objective #2 Directions: Determine whether the following are scientific theories or scientific laws. Try to do this without using notes or other resources. Once you are finished, check your answers with the Key on the class portal. If you got most of them right, you may be ready for this section of the test. 1. F = ma Law 2. Earth’s magnetic field is generated by a conducting fluid in its core. Theory (its answers “why”) 3. The inverse-square law for gravity and Newton’s Laws of motion explain why orbits are ellipses. Theory 4. Momentum is the product of a bodies mass and its velocity. Law.

(2) Directions: Fill out the Venn diagram below comparing theories and laws. Try to do this without using notes or other resources. Once you are finished, check your answers with the Key on the class portal. If you got most of them right, you may be ready for this section of the test.. Explain how nature works Biology has more of these.. Supported by large amount of data Tested hypothesis Helps unify field of study. Chemistry and Physics have more of these. Describes what nature does under certain conditions (usually with a mathematical formula). Can be modified if even 1 peerreviewed experiment Widely produces dataaccepted by a vast showing majority (if not all) scientists disagreement within a discipline.. Practice WS for Objective #3 Directions: Answer the questions for each experiment described below. Try to do this without using notes or other resources. Once you are finished, check your answers with the Key on the class portal. If you got most of them right, you may be ready for this section of the test. 1. Zach likes to play Halo on his Xbox 360. He thinks that listening to screamo music will make him play better than listening to his normal Beethoven. For one week, Zach listens to his Beethoven while playing Halo, and checks his stats. The next week he listens to Attack Attack while playing Halo, and checks his stats. What is Zach’s hypothesis? If I listen to screamo music while playing Halo, then I will play better because it…… Independent Variable: Screamo music Dependent Variable: Halo stats Control Group: Group listening to Beethoven..

(3) Constants: How long he listens to the music, the level of difficulty of the game, temperature, time of day, etc. How could he improve this experiment? Try playing with no music at all, do it for longer than one week, include more music genres, do more trials. 2. Molly likes to text her friends. She thinks that Verizon texts get sent faster than Sprint. Using Verizon, for one week she records what time she sends each text and has each friend record what time they receive a text. The next week, using Sprint, she records what time she sends each text and has her each friend record what time they receive each text. She then compares the two weeks of texts. What is Molly’s hypothesis? If Verizon is used for texting, then people will receive your texts quicker because Verizon has better reception. Independent Variable: Verizon Dependent Variable: The time of receiving the text. Control Group: Sprint 3. Christina likes to watch movies at home with her friends, but she always falls asleep during the movie. She wonders if a certain genre makes her fall asleep faster than others. For one week, she watches a different comedy movie each day and records how quickly she falls asleep. For the second week, she watches a different romance movie each day and records how quickly she falls asleep. For the third week, she watches a different drama movie each day and records how quickly she falls asleep. She then compares her results. Independent Variable: Genre of movie Dependent Variable: Time she falls asleep Control Group: There really isn’t one. There is no group not receiving a variable..

(4) Practice WS for Objective #5 Directions: Label the microscope below. Check your answers with the Key. Eyepiece (Ocular). Body Tube. Revolving Nose piece Arm Low Power Objective Lens Stage Clips. High Power Objective Lens Medium Power Objective Lens Stage Condenser Coarse Adjustment Knob. Fine Adjustment Knob Illuminator. Base.

(5) Directions: Describe the uses of each microscope part written below. Try to do this without using your notes or other resources. If you answered most of them correctly, you may be ready for this section of the test. . Ocular lens – These are generally 10x. These are the lenses you look through with your eyes.. . Revolving nosepiece – This is located above all the objective lenses and allows you to rotate from one objective lens to another.. . Diaphragm – This is located underneath the stage. Use the diaphragm lever to control the amount of light coming through. Generally more light will clarify the specimen, and lower light will increase contrast.. . Fine focus knob – You use this to focus when you are on any power higher than the 40x. Adjust this knob to bring the specimen into focus when you switch to a higher power magnification.. . Illuminator – This is the light source! You need light to be able to see your specimen.. . Low power objective lens – This is your 4x objective lens. Total magnification would be 40x (don’t forget to include your ocular magnification). You ALWAYS begin with this lens and focus at this power first before moving to higher power. You also store your microscope with this lens in place.. . Course focus knob – This is the focus knob you will use when first trying to focus your image. Start with your stage all the way at the bottom and slowly bring up the stage with the coarse adjustment knob until your image is in focus. After this, you won’t use the coarse focus knob again.. . Stage clips – These are located on the stage and hold your slide in place.. . High power objective lens – Some of our microscopes have 4 objective lenses (so you will have 2 high power lenses) and some only have 3 objective lenses (1 low, 1 medium, and 1 high power lens). So generally we will only use the 40x as our high power lens which would give us a total of 400x magnification. Use this after you have focused on both the low then medium power lenses. This will be used to view extremely small objects such as cells!. . Stage – What you sit your slide on..

(6) Practice WS for Objective #6 Directions: Answer the following questions regarding observations, inferences, and predictions. Try to do this without looking at your notes. 1.. What is the difference between a qualitative observation and quantitative observation? Qualitative observations are observations (descriptions using our 5 senses) that do NOT include numbers in them. Quantitative observations DO include numbers in them.. 2. What are inferences? Assumptions you make based on your observations. These are not necessarily true. 3. What are predictions? Assumptions about what you think will happen in the future based on your observations. These may or may not come true.. Debatable: how do they know it went faster? I’d accept either.

(7) Make 5 qualitative observations using the photo above:     . The road is black There are lines down the middle of the road The house has a roof There is a crack in the ground The road is disconnected. Make 5 quantitative observations:     . There are two barns There are 15 trees There is one collapsed barn There are 4 power poles. The barn has 4 visible windows. Make 4 inferences:    . There was an earthquake One barn was stronger than the other The power lines fell because of an earthquake People were harmed. Make 4 predictions:    . Electricians will fix the power lines The town will have to spend a lot of money on repairs People will not be able to drive on the road for a while The house/barn owners will have to rebuild.

(8)

No results found