1. TAKS Warm-ups Objective 1: Nature of Science Week 1: February 2 - 6

2. TEKS 8.1A – Demonstrate safe practices during field and laboratory investigations. 1. Which step should be taken before the liquid in the flask is heated? A Place the flask in a water bath B Remove some of the liquid C Insulate the flask D Remove the stopper Week 1: Day 1

3. TEKS 8.1A – Demonstrate safe practices during field and laboratory investigations. 2. The pictures shown are safety symbols used to warn students about potential hazards they may face while conducting an experiment. Which of the following experiments would include all of the above safety symbols? A. An experiment using hydrochloric acid and sodium bicarbonate demonstrating chemical changes. B. An investigation into the speed of sound that measures the time it takes for each student to hear a specific sound. C. An activity that compares the illumination of light bulbs by cutting a hole in a shoebox and building a light tester. D. A lab on waves during which students fill a pan with water and observe waves made by adding water droplets to the pan. Week 1: Day 1

4. TEKS 8.2A: Plan and implement investigative procedures including asking questions, formulating testable hypothesis, and selecting and using equipment and technology. 3. After reading the liquid level in the graduated cylinder, what must a student determine to calculate the density of the liquid? A Color B Boiling point C Mass D Temperature Week 1: Day 2

5. 4. Jeremiah has been studying the experiments performed by Gregor Mendel in his study of inheritance patterns. Jeremiah decides he would like to test the inheritance patterns of tall and short pea plants. Which statement should be his hypothesis? A. Pea plants are commonly grown in many gardens. B. Pollen from flowers of tall plants is used to fertilize the flowers of short plants. C. Results of previous studies on pea plants have been inconclusive. D. If a purebred pea plant is crossed with a purebred short pea plant, all offspring will be tall. TEKS 8.2A: Plan and implement investigative procedures including asking questions, formulating testable hypothesis, and selecting and using equipment and technology. Week 1: Day 2

6. TEKS 8.2B: Collect data by observing and measuring. 5. Gas is being collected in the graduated cylinder shown above. The cylinder was filled to the top with water before the gas was released through the tube. How much gas has been collected in the cylinder? A 15 mL B 27 mL C 35 mL D 38 mL Week 1: Day 3

7. TEKS 8.2B: Collect data by observing and measuring. 6. The diagram above shows a close-up view of a triple-beam balance that is being used to measure the mass of a rock. What is the mass ofthe rock in grams according to the diagram? Record and bubble in your answer to the tenths on your answer sheet. Week 1: Day 3

8. TEKS 8.2C: Organize, analyze, evaluate, make inferences and predict trends from direct and indirect evidence 7. The graph shows temperature readings taken in a classroom over four days. Based on the table, the temperature at noon on Day 5 will most likely be — A 17°C B 18°C C 20°C D 21°C Week 1: Day 4

9. TEKS 8.2C: Organize, analyze, evaluate, make inferences and predict trends from direct and indirect evidence 8. Paramecium caudatum was cultured first. Paramecium aurelia was added to the same culture one day later. According to the graph, which is the first day that P. aurelia will exist alone in the culture medium if the trend shown continues? A Day 12 B Day 13 C Day 16 D Day 18 Week 1: Day 4

10. TEKS 8.2D: Communicate valid conclusions. 9.Bill puts equal amounts of hot chocolate in different containers: a foam cup, a ceramic mug, and a metal can. He measures the temperatures of the three samples of hot chocolate. They are all equal. Bill waits 15 minutes. He measures the temperatures again. The hot chocolate in the metal container has cooled the most. The hot chocolate in the plastic foam cup has cooled the least. What should Bill conclude from this experiment? A. Metal is a good heat conductor and plastic foam is a good heat insulator. B. Plastic foam is a conductor and ceramic is the best insulator. C. Hot chocolate should never be consumed from a plastic foam cup. D. Stirring hot chocolate causes it to cool more quickly. Week 1: Day 5

11. TEKS 8.2D: Communicate valid conclusions. 10.Some data about the atmosphere of Mars are shown above. What conclusion can be made about the ability of humans to breathe Martian air? A. Life support will be needed because the percentage of oxygen is too low. B. It will be impossible to breathe because the percentage of nitrogen is too low. C. Oxygen and nitrogen will make it possible for photosynthesis to produce food. D. Humans will be able to breathe the air because oxygen is present. Week 1: Day 5