Grade 9 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 20
Grade 9 science practice based on published U.S. learning expectations, with reproducible original variations. This printable version includes 8 grade-appropriate questions and a separate answer sheet.
Science Concepts and Evidence
Grade 9 · Stretch challenge · 8 questions · Version PG-12QIB1D-4QJ5
What is evolution?A. Organisms interacting with each other and their environment B. Growth, repair, and asexual cell reproduction C. It is expressed in the phenotype D. Change in inherited population traits over generations
What does a dominant allele do in a heterozygote?A. It is expressed in the phenotype B. Mitochondria C. They speed reactions by lowering activation energy D. Organisms interacting with each other and their environment
What organelle produces most cellular ATP?A. Change in inherited population traits over generations B. DNA C. Growth, repair, and asexual cell reproduction D. Mitochondria
What is the role of enzymes?A. They speed reactions by lowering activation energy B. Net movement from higher to lower concentration C. DNA D. It is expressed in the phenotype
What is mitosis used for?A. Net movement from higher to lower concentration B. DNA C. Mitochondria D. Growth, repair, and asexual cell reproduction
What molecule stores hereditary information?A. They speed reactions by lowering activation energy B. Growth, repair, and asexual cell reproduction C. Mitochondria D. DNA
What is an ecosystem?A. Organisms interacting with each other and their environment B. Change in inherited population traits over generations C. It is expressed in the phenotype D. DNA
What is diffusion?A. Organisms interacting with each other and their environment B. It is expressed in the phenotype C. DNA D. Net movement from higher to lower concentration
Answers and teaching notes
Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.
Show answers for version 20
- What is evolution?Change in inherited population traits over generations
- What does a dominant allele do in a heterozygote?It is expressed in the phenotype
- What organelle produces most cellular ATP?Mitochondria
- What is the role of enzymes?They speed reactions by lowering activation energy
- What is mitosis used for?Growth, repair, and asexual cell reproduction
- What molecule stores hereditary information?DNA
- What is an ecosystem?Organisms interacting with each other and their environment
- What is diffusion?Net movement from higher to lower concentration
Worked example
Read the direction, identify the assessed skill, solve or cite evidence, and check the response.
Common mistake
Using a memorized procedure without checking what the question asks.
Helpful hint
Name the standard skill before answering.