8. What does the body manufacture to fight infection?
A. white corpuscles
B. red corpuscles
C. hemoglobin
D. platelets

answer:

Explanation:

in this activity, students are asked to plan and design their own   investigation, including the steps on how they will gather and analyze data to come   up with an answer to this question: how does the mass of an object affect the   amount of heat it can transfer?

example scenario:

you may fill identical containers with different amounts of water of the   same temperature, say hot water. then you pour both contents into two   containers with water of the same amount and temperature. then you   measure the increase in temperature of water in both containers. the amount   of increase in the temperature of water can be related to the amount of heat   transferred to the object

a. what are your variables?

independent variable: mass of an object

dependent variable: amount of heat it can transfer

controlled variable (constant): temperature

the mass of an object is directly proportional to the amount of heat it can transfer. which means you need more energy transfer or heat to raise the temperature of a big mass than you need for a small mass. water has a specific heat capacity of 1 cal/g°c. so it takes 1 calorie of heat   to raise the temperature of 1 gram of water by 1°c.

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code 8.22.1.3.