Unit 2
What is the connection between oxygen and food in your body? Choose the best answer. (MS-LS1-7)
A.The circulatory system breaks down the food you eat into smaller particles/molecules. The digestive system moves/transports the smaller particles to all the cells in the body. We get our energy from what happens in the cells when the oxygen and food react to produce energy.
B.The digestive system breaks down the food you eat into smaller particles/molecules. The circulatory system moves/transports the smaller particles to all the cells in the body. We get our energy from what happens in the cells when the oxygen and food react to produce energy.
C. The digestive system breaks down the food you eat into smaller particles/molecules. The circulatory system moves/transports the smaller particles to all the cells in the body. We get our energy from what happens in the cells when the carbon dioxide and water react to use energy.
D. The digestive system breaks down the food you eat into smaller particles/molecules. The nervous system moves/transports the smaller particles to all the cells in the body. We get our energy from what happens in the cells when the sugar and oxygen react to use energy.
B. The digestive system breaks down the food you eat into smaller particles/molecules. The circulatory system moves/transports the smaller particles to all the cells in the body. We get our energy from what happens in the cells when the oxygen and food react to produce energy.
Why would your body be considered a system? Choose all that apply. (MS-LS1-3)
A. Our body does life processes.
B. Our body is a system because it is made of molecules.
C.Our body is a system that has other systems that are a part of it.
D. We have a circulatory system, digestive system, nervous system that all have parts that interact. They interact with each other to form our body system.
C. Our body is a system that has other systems that are a part of it.
D. We have a circulatory system, digestive system, nervous system that all have parts that interact. They interact with each other to form our body system
. What are organisms (living things) made up of?
A. Skin
B. Cells
C. Bacteria
D. muscles
B. Cells
Look at the definition that your class developed for a system. Based on this definition, is the pen a system? Explain your answer. (MS-LS1-3)
A. A pen is a system because it works to write.
B. A pen is not a system because that is not a part of its name.
C. A pen is a system because it is made up of parts that are put together to make it write.
D. A pen is a system because it is made of parts.
C. A pen is a system because it is made up of parts that are put together to make it write.
Are bones living things? How do you know? (MS-LS1-2)
Bones are made of cells. They make blood cells and they grow. If they grow, that means they make new bone cells too. When they break, they add more material in order to repair the bone.
What is a Cells ?
Cells are tiny parts that make up our body
What systems are involved in getting sugar molecules to the cells? Choose 2. (LS-MS1-3)
A. Digestive system
B. Excretory system
C. Circulatory system
D. Nervous system
A. Digestive system
C. Circulatory system
A group of students makes a claim that body systems work together to maintain the human body. To support their claim, the students present evidence comparing cells and tissues in the muscular system with those in the skeletal system. They say that the movement of arms and legs is caused by the contraction of muscles connected to bones. This is evidence that body systems work together to maintain the human body. MS-LS1-3
Which statement can be used as evidence to further support the group’s claim?
A.Cells in the nose and mouth filter air breathed into the lungs.
B. Cells in the brain produce signals that control the movement of the eyes.
C. Cells in the mouth, stomach, and small intestine chemically break down food.
D.Cells in the walls of the heart and blood vessels allow blood to pass throughout the body.
B. Cells in the brain produce signals that control the movement of the eyes.
What happened to cause a taste change when you chewed the cracker? (MS-LS1-3)
A. The cracker was being broken down and stored sugar was being released.
B. Your tongue was able to taste the sugar that was on the cracker.
C. The protein in the cracker broke down into sugar and made it sweet.
D. The cracker was broken down and fat was released.
A. The cracker was being broken down and stored sugar was being released.
What is a Variations ?
The differences in a trait
What systems are involved with moving the O2 through the body? Choose 2. (LS-MS1-3)
A. Digestive system
B. Nervous system
C. Respiratory system
D. Circulatory system
C. Respiratory system
D. Circulatory system
When a dust particle enters your nose, you may sneeze to get rid of it. Explain how different body systems interact to make you sneeze. You may draw a model to help you explain. Choose the best answer. (MS-LS1-8)
A. The respiratory system (nose, lungs) sends a message to the lungs that your nose is being tickled, and the brain tells the nose and you sneeze.
B. The respiratory system (nose, lungs) sends a message to the brain that your nose is being tickled, and the brain tells the muscular system (chest muscles) to contract to push out the particle.
C. The respiratory system (nose, lungs) sends a message to the brain that your nose is being tickled. You then sneeze.
D. The respiratory system (nose, lungs) sends a message to the spinal cord that your nose is being tickled, and the brain tells the muscular system (chest muscles) to contract to push out the particle.
B. The respiratory system (nose, lungs) sends a message to the brain that your nose is being tickled, and the brain tells the muscular system (chest muscles) to contract to push out the particle.
What has to happen to food so that the substances that provide energy and building materials can be used in the body? (MS-LS1-3)
A. Food has to be broken down into simple molecules through mechanical and chemical processes.
B. Food needs to be mixed with water to be able to be used.
C. Food is only broken down by breaking it mechanically into smaller pieces.
D. Food is only broken down by chemical processes.
A. Food has to be broken down into simple molecules through mechanical and chemical processes.
Greg broke his femur, the big bone in his thigh. It is starting to heal. (MS-LS1-3)
Part 1:
What fills in the space between the two parts of the bone at the break?
NEW BONE CELLS
What is a Trait ?
is a characteristic of an organisms and can be inserted from parent or influenced by the environment
The students claim that several body systems work together; therefore, these body systems change a person’s breathing rate depending on the level of activity. MS-LS1-3
Identify three body systems that work together to change a person’s breathing rate depending on the level of activity.
The body systems that work together may include three of the following:
the circulatory system
the respiratory system
the nervous system
Function of the nervous system ?
Controls everything you do
The circulatory system connects to the digestive system. Why is this important in getting the cells what they need? (MS-LS1-3)
A. The circulatory system takes the oxygen from the digestive system to all the cells. Cells need oxygen for energy.
B. The circulatory system takes blood cells around the body to keep us alive.
C. It connects to the digestive system in order to get the digested food molecules. Cells need food for energy and reproduction.
D. The circulatory system connects to the digestive system so that it can absorb some of the acids used in digestion. These acids also aid the white blood cells in fighting disease.
C. It connects to the digestive system in order to get the digested food molecules. Cells need food for energy and reproduction.
Greg broke his femur, the big bone in his thigh. It is starting to heal. (MS-LS1-3)
Part 2: Where do these new cells come from?
Existing bone cells divide and produce new cells
List 3 examples that can affect the populations?
climate
other organisms
pollution
environment
...
Those that can be learned or changed depending on organisms interaction with environment.
What is a trait that can be both inherited and acquired?
Skin color
hair color (dye hair)
big muscles (weights)
jumping ability (long legs)