Bell work 1-10 7th Grade
#1 1. Which one of the following would not be a good question to use as the basis of a scientific experiment? A. How does the amount of sunlight affect plant growth? B. What is the scientific name for a daisy? C. What effect does fertilizer have on tomato plants? D. How do different soil types affect tree height? 2. What will a well-chosen sample size ensure in an experiment? It will produce clearer and more usable results 3. If a fire erupts, immediately do this Notify the teacher 4. What are the male parts of the flower? Stamen (filament, anther) 5. What is the first step in the scientific method? observation
#2 1. When are goggles used in the laboratory? any time there are chemicals, heat, or glassware 2. If a piece of equipment is not working properly, stop, turn it off, and tell whom? The teacher 3. What follows conclusion in the scientific method? (report findings) 4. What is an educated guess called? a hypothesis 5. What is the variable controlled by the experimenter called? Independent variable
#3 1. What is the metric unit of volume? 2. The prefix kilo- means ? milliliter 2. The prefix kilo- means ? 1000 3. What is one decameter? 10 meters 4. Which of the following is a mixture? Salt water, salad, helium, aluminum ladder Salt water and salad 5. What are the steps to the scientific method? observation, hypothesis, experiment, analyze data, conclusion, and report findings
#4 Why are there multiple trials in an experiment? - to insure the validity of the results 2. What adaptive feature helps the bear survive the winter? - hibernation What is a quantitative piece of data indicating? - how much, numbers What is the metric prefix that means 100? - hecto What is qualitative data? -description
#5 What is a hypothesis? an educated guess What is a conclusion? a statement that either supports or does not support the hypothesis 3. What is photosynthesis? process which plants make food 4. What are the 4 pathogens? protists, fungi, bacteria, virus 5. What period is hydrogen in? 1
#6 How many independent variables are in an experiment? Only one What is a scientist using a balance probably trying to measure? mass What is the last step in the scientific method? Report findings What step in the scientific method has graphs? Analyze data What is an educated guess called in science? hypothesis
#7 What metric unit is used to measure mass? gram 2. What three organs make up the nervous system? brain, spinal cord, nerves 3. What is the largest organ in the body? skin 4. How many protons does Nitrogen have? 7 5. How many neutrons does Beryllium have? 5
#8 What contains the magnifying lens in a microscope? the eye piece 2. Which variable is graphed on the x-axis? independent 3. Earth’s rotation takes about ____ day(s). 1 day 4. In an experiment, which is the one variable that is purposely changed to test a hypothesis? independent variable 5. The piece that supports the microscope is called the______? base
#9 What is the function of the mitochondria in the cell? produce energy 2. Farmers and food companies use ___ to make milk into the many varieties of cheeses and yogurt. bacteria Tissues are found in living things. What is the definition of a tissue? a group of cells with similar structure and function 4. Infer how air is changed between the time it is inhaled by a mammal and the time it is exhaled? It contains less oxygen and more carbon dioxide 5. In the human body, the digestion of proteins takes place primarily between which two organs? Stomach and small intestines
#10 A male chimpanzee has 48 chromosomes in each of his regular body cells. How many chromosomes would be found in each of his sperm cells? 24 2. Who is known as the father of genetics? Gregor Mendel Hereditary information is found in a cell’s______. chromosomes 4. Which metric unit would highway road markers use to indicate the distance between Greenville, SC and Charleston, SC? kilometer 5. The up and down columns in the periodic table are called ___. groups