Science Problem of the Day 1-10

Jane is investigating to find out if bean plants grow taller in ordinary topsoil or special potting soil over a three week period. She sets up her investigation with 10 bean plants of equal size in each type of soil. What should Jane do each day to make sure she gets valid results?

• Water only the plants in special potting soil.

• Calculate the average plant height for each soil type.

• Move the plants in ordinary topsoil to different locations.

• Estimate the height of each plant's stem and record the estimate.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

Marc notices that when he looks at the stars at night, some appear to be brighter than others. Which three factors affect how bright a star appears to an observer on Earth?

• the star's color, size, and distance from Earth

• the star's energy, size, and temperature

• the star's size, temperature, and distance from Earth

• the star's movement, distance from Earth, and gravity

Janice found two sea shells when she went to the beach. They appear to be almost the same size, but they have different shapes. How could she figure out if their volume is the same?

• Weigh each one on a scale to see which is heaviest.

• Fill each one with water to see which will hold the most.

• Drop each one in a beaker of water to see which raises the water level the most.

• Measure the length of each one with a measuring tape to see which is longest.

What is the purpose of the pancreas?

• mixing blood and oxygen

• removing excess fluids from the body

• storing large quantities of blood, minerals and vitamins

• helping with digestion by secreting enzymes to process sugars

Tags

NGSS.MS-LS1-7

Sonya wanted to know if mowing affects the health of grass during a drought. To find out, she collected data on how often her neighbors mowed their grass. Based on the information she collected, what is the BEST next step?

• Report her findings to her neighbors.

• Develop a plan to save everyone's lawns.

• Stop her neighbors from mowing their lawns.

• Find out if other things might be affecting the grass.

Tags

NGSS.MS-LS2-1

The two objects shown are the same size. However, one object is made of wood, and the other object is made of plastic. Which of the following properties of the objects will be the same?

• mass

• texture

• volume

• weight

Which of the following is true of the Sun?

• The Sun is the closest star to Earth.

• The Sun is the largest star in the Milky Way.

• The Sun is the largest planet in our Solar System.

• The Sun is an example of a galaxy that gives off light energy.

Which answer best describes the purpose of the liver in the human body?

• The liver mixes blood and oxygen.

• The liver removes excess fluids from the body.

• The liver stores large quantities of blood and oxygen.

• The liver cleans the blood coming from the digestive organs.

Tags

NGSS.MS-LS1-7

Thomas and Julie wanted to find out which material would insulate their teacher's coffee cup and keep the coffee hot for the longest period of time. They first wrapped her cup with bubble wrap and recorded the temperature of the coffee once every 15 minutes for 2 hours. They repeated the investigation, this time using newspaper instead of bubble wrap, but they got the same results for both materials. What could they do to make sure their results are valid?

• Repeat their experiment

• Use tea instead of coffee

• Use a different thermometer

• Conduct their investigation in a colder room

Tags

NGSS.MS-ETS1-3

NGSS.MS-PS3-4

NGSS.MS-PS3-3

Which of the following consists of gas, dust, and many stars?

• the Earth's atmosphere

• a galaxy

• a solar system

• the Sun

Tags

NGSS.MS-ESS1-2