crime busters

Which powder may be found in a heat pack?

• Cornstarch

• Sodium Acetate

• Calcium Carbonate

• Gelatin

Which "powder" DOES NOT dissolve in water?

• Gelatin

• Vitamin C

• Sand

• Flour

What is another name for Baking Soda?

• Sucrose

• Sodium Bicarbonate

• Sodium Acetate

• NaCl

Which "powder" swells when placed in water?

• Sand

• Flour

• Vitamin C

• Gelatin

What is another name for Vitamin C?

• Table Salt

• Ascorbic acid

• Limestone

• aragonite

Which powder is used to produce plaster of Paris (and used with orthodontics)?

• Yeast

• Gypsum

• Baking Soda

• Sand

The deepest layer of hair (compared to the lead of a pencil) is the ___

• medulla
• cortex
• cuticle
• keratin 

What does it mean to dilute a solution?

• lower the concentration of solute per solvent
• increase the concentration of solute per solvent

How many grams are soluble in 100 g of water at 100 ºC?

• 300 grams

• 250 grams

• 100 grams

• 50 grams

Tags

NGSS.MS-PS1-4

which powder is the only microorganism?