Food and Nutrition Fats Test. Foods contain specific materials such as fats, proteins, sugars, and acid that work together to create healthy or unhealthy eating choices. Big Idea:. Engaging Scenario.
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FOSS food and Nutrition, TESLA Science Notebooks
The nutritionist for the Lewiston School District is in charge of planning the lunch menu. She has a very difficult job because she is required by law to make lunches as healthy as possible, but she still needs to have students enjoy what they are eating. Whenever she chooses to update the menu she conducts tests on many different types of food to determine the type of nutrients they contain. There are so many different types of food available that she is asking for our help in determining which of our favorite foods contain the most fat. She needs us to keep accurate records and send her our results in two weeks.
What do we need to investigate?What is the problem that needs to be solved?
“Discuss with your group what we need to investigate and record it as the FOCUS QUESTION. This is the problem we are going to investigate and solve.”
How can we …
test foods to determine the amount of fat that they contain?
Nutrient: a chemical in food that helps keep organisms alive and active.
Fat: a group of nutrients that provide energy and building blocks for the development ofsome body systems.
The districts nutritionist has sent us a list of foods that are commonly used in the lunch menu. Since she is so busy, she would like us to help her determine which of the foods are high in fat and which foods are low in fat. Our work will help her plan healthy lunches for students.
What rational did you use to determine where you would place the foods on your list?
I would like you to record a prediction in your science notebook. Using the foods from our list, discuss with your group which 2 foods will contain the most and least amount of fat. Be ready to share your ideas with the class. .
I predict that _________________________ will contain the least amount of fat, because…
I predict that ______________________ will contain the most fat, because…
Yesterday we made a chart that compares the amount of fat in the foods we eat. We did not have a lot of evidence to base our comparisons so we were basically just making predictions. Today we will begin testing some of the foods that we have collected and comparing the amount of fats in each.
The district nutritionist is required by law to provide healthy menu items. She cannot serve a meal and tell people that she thinks it is a healthy meal. She needs to be able to provide evidence that the meal is healthy and meets the dietary guidelines she is required to follow.
“What do you think will happen if I place a greasy piece of food on this piece of brown paper?”
--- Greasy foods leave a grease spot on paper
“Would you consider this food to be high in fat?”
---To a chemist fats are chemicals called lipids, but to the district nutritionist,
fats are oil and greases.
“Could we compare the fat content of several foods using a brown paper test?”
--- Discuss ideas with your group… What do you need to consider to
set-up an investigation and produce fair and accurate results?
In order for the results of this investigation to be fair and accurate, the variables in the experiment must be controlled.
Today we are going to take a close look at the results of our fat test to see if we can help the nutritionist determine which foods contain more fats.
Is there evidence that any of the food samples contain fat?
--- Wet looking grease spots are evidence of fat.
Do any of the foods appear to have more fat than others?
Which foods tested contained the greatest and least amount of fat? How do you know?