Question | Answer |
The element lithium (Li) is most likely to react chemically with which element? | Fluorine |
Which element shares the same physical and chemical properties of neon (Ne), an invisible gas which doesn't react easily with other elements? | Helium |
Which of the following elements could easily substitue for Calcium (Ca)? | Magnesium |
Why do the skeletal muscle cells and smooth muscle cells look different from each other? | They are specialized to perform different functions |
Which organic molecule does Benedict's solution identify? | Carbohydrates |
What is an independent variable? | variable that scientists choose to change |
Hormones are a part of which body system? | Endocrine system |
Where is protein digested? | Stomach and Small Intestine |
Which organs are primarily responsible for removing waste products from the blood? | kidneys and lungs |
Name the organic molecule that is made of sugars and starches. | Carbohydrates |
What will happen to the heart rate as someone runs on the treadmill? | it will increase |
Why does heart rate increase while exercising? | muscles need more glucose and oxygen because they are working harder |
What are the bottom chambers of the heart called? | ventricles |
What is the difference between arteries and veins? | Veins carry blood to the heart while arteries carry blood away from the heart |
What is the sequence that blood travels through the body? | heart to lungs to heart to body |
What is the best way as 7th graders describe atoms? | by constructing a model |
What must happen to food in order for organisms to use it for growth and repair? | food must be broken down |
What gas does the body use to help convert into energy? | oxygen |
Where do waste products in the lungs come from? | they are produced when glucose and oxygen react in cells, releasing energy |
Which gas is produced as a waste product by the body? | carbon dioxide |
What is the structure of bones like? | they are living structures that contain blood vessels and nerves |
What part of the body sends messages between body organs? | hormones |
What path does a nerve impulse travel in the body? | sensory neuron to spinal cord to motor neuron |
Which two systems of the body directly interact to produce a reflex action? | nervous and muscular |