The reaction XY ⟶ X + Y is an example of _____. a. synthesis b. combustion c. decomposition d. replacement

in litmus , alkali solution turns to _________ color.

What type of reaction best describes the equation below? Zn + H2S -- ZnS + H2 a. decomposition b. double replacement c. single replacement d. decomposition

The vessel for water a. phloem b. xylem c. a and b d. none of the above

The product of acid + base yields salt and _____________. a. water b. hydrogen c. oxygen d. carbon dioxide

Sex cells are generally called _______. a. zygote b. diploid c. haploid d. gametes

Where in the plant cell does photosynthesis happen? a. vacuole b. vascular bundles c. chloroplast d. chlorophyll

A negative acceleration means that your object is a. at rest b. constant speed c. speeding up d. slowing down

In starch test, the iodine in the leaves turns _________ which indicates the presence of starch. a. green b. blue black c. red

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products? a. the product is doubled b. the mass changes depending on the reaction c. the product is half the mass of the reactants d

. Chlorophyll is: a. The substance that makes plants green. b. Found inside the chloroplast cells. c. Used to absorb energy from the sun. d. all of the above

When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solution? a. condensation b. filtration c. evaporation/ crystallization d. neutralization

Which of the following pairs is mismatched? a. Carpel - Produces pollen grains b. Stigma - Receives pollen grains c. Anther - Produces microspores d. Ovary - Develops into fruit