Question

1. tahmina has been studying plants and thinks that there are more flowering plants than nonflowering plants in her area. she takes pictures of each type of plant and then classifies each plant. after analyzing her results, tahmina decides that she was correct—there are more flowering plants than nonflowering plants. she creates a chart to share with her class, showing the number of each type of plant along with examples that she found of each type. which of the following steps of the scientific method are missing from tahmina’s investigation?

a. making a hypothesis
b. communicating with others
c. collecting and interpreting data
d. identifying and controlling variables

1. four students collected data on the weather. the table below shows the information recorded by each student.

name	information recorded
mark	it is hotter than most june days.
ali	the high temperature was 39 °c.
chen	the heat is making people sweat.

which student recorded an observation that can be tested and verified?

a. jenny
b. mark
c. ali
d. chen

1. a doctor says that drinking two glasses of milk in the morning will give students more energy. which of the following would be good scientific evidence for or against the doctors claim?

a. a brochure from the doctor stating the benefits of milk
b. data from scientific investigations about drinking milk in the morning
c. a tv advertisement that drinking milk in the morning gives people plenty of energy
d. statements from five people about how drinking milk in the morning gives them energy

1. groups of students completed an investigation on the effects of vinegar on gummy bears. they recorded their findings in their science notebooks and shared their data with each other. why is it important for these groups to show their data to one another?

a. they need to compare which group has the best data table.
b. they want to see what the other groups did.
c. they want to record everyone’s observations in the same notebook.
d. they want to compare the data to check for accuracy.

Explanation:

1. Tahmina made a hypothesis (more flowering plants), collected and interpreted data (took pictures, classified, analyzed), and communicated (created a chart). But she didn't identify and control variables. Variables like area size, time of study etc. could affect results.
2. Ali's statement about the high - temperature being 39°C is a quantitative observation that can be tested and verified. The others are qualitative and subjective.
3. Scientific evidence comes from scientific investigations. A brochure, TV advertisement, and statements from a few people are not reliable scientific evidence.
4. Sharing data allows groups to compare and check for accuracy. It helps in validating results and ensuring reliability of the investigation.

Answer:

1. D. Identifying and controlling variables
2. C. Ali
3. B. Data from scientific investigations about drinking milk in the morning
4. D. They want to compare the data to check for accuracy.